---
title: "Online Math Tutor for 7th Grade | Live 1:1 Classes | Modern Age Coders"
description: "Live 1:1 online math tutoring for 7th graders: proportional reasoning, rational-number arithmetic and two-step equations built from reasons, before algebra placement. One-hour classes twice a week, free demo."
canonical: https://learn.modernagecoders.com/online-math-tutor-7th-grade
keywords: ["online math tutor 7th grade", "7th grade math help", "math tutor for 12 year old", "grade 7 math tutoring", "proportions help 7th grade", "integers help", "pre algebra tutor", "algebra readiness", "common core 7th grade math"]
source: src/pages/online-math-tutor-7th-grade.html
---
> Live 1:1 online math tutoring for 7th graders: proportional reasoning, rational-number arithmetic and two-step equations built from reasons, before algebra placement. One-hour classes twice a week, free demo.

Enroll now

## Pick the course. Start this week.

Every mentor teaches from a structured programme, adapted live to your child. Open a course to see the full syllabus and enroll in minutes, or start with the **free demo class** and let the diagnostic pick the level for you.

[![Middle School Mathematics Mastery course thumbnail](/images/middle-school-maths.webp)Best fit  Middle School Mathematics Mastery Ratios, negatives, algebra and geometry: the make-or-break years, taught for genuine ownership. Grades 6-88 live classes / monthFree demo first **$100**/mo group · **$150**/mo 1-on-1 View course & enroll](/courses/comprehensive-middle-school-mathematics-mastery)[![Elementary Mathematics Masterclass course thumbnail](/images/elementary-maths.webp)  Elementary Mathematics Masterclass Counting to advanced problem solving: number sense, fractions, geometry and word problems, built concrete-first. Grades 1-58 live classes / monthFree demo first **$100**/mo group · **$150**/mo 1-on-1 View course & enroll](/courses/elementary-mathematics-complete-masterclass)[![Algebra Foundations Masterclass course thumbnail](/images/algebra-foundations.png)  Algebra Foundations Masterclass Pre-Algebra and Algebra 1 taught as a language, the most consequential stretch in school math. Grades 7-98 live classes / monthFree demo first **$100**/mo group · **$150**/mo 1-on-1 View course & enroll](/courses/algebra-foundations-masterclass)See what is includedThe 20-second answer

A good online math tutor for a 7th grader does three things: **builds proportional reasoning as one idea**, so percent, scale, rates and later slope all click into the same slot; **derives the sign rules** for negative arithmetic from patterns the child can rebuild, instead of chants that scramble; and **gets two-step equations fluent** before algebra makes them assumed knowledge. That is what we do: 8 live one-hour classes a month, 1-on-1 for $150 a month or small group for $100, free demo class first.

Why grade 7 predicts algebra

## Proportionality is the hinge every later course swings on.

Ask a math teacher which single skill predicts algebra success and most will give the same answer: proportional reasoning. Slope is a proportion. Similar triangles are proportions. Unit conversion, percent change, probability, direct variation, trig ratios years later: all the same mental move. Grade 7 is the year that move either becomes reasoning or hardens into "set up the two fractions and cross-multiply", a ritual that dissolves the moment problems arrive in words.

The second engine is rational-number arithmetic. Grade 7 finishes the number system: adding, subtracting, multiplying and dividing with negatives and fractions together. The sign rules look small, but every algebra error chain traces back through them. A child who "sort of knows" that negative times negative is positive, without any idea why, is one distracted moment from minus signs scattering everywhere.

And grade 7 is where tracking quietly happens. Many US districts decide algebra-in-grade-8 placement on grade 7 performance, which means this year's understanding directly shapes the high-school transcript, AP timeline and, bluntly, college options. Few parents are told this while it still matters.

Our work: build proportionality as one visual idea across every context it wears, derive the sign rules from patterns so they cannot scramble, and drill two-step equations to fluency. Done from reasons, grade 7 is the year a student starts feeling like a mathematician. That feeling, walking into algebra, is worth more than any single grade.

Is this your child?

## Nine signs a 7th grader needs math help now, not later.

### Every proportion is cross-multiplied blind

The setup is guessed, the crossing is ritual, and word problems misfire because the relationship was never seen.

### Sign rules scramble under pressure

-3 + 7, -3 - 7 and (-3)(-7) all get the "two negatives make a positive" chant applied at random.

### Percent problems only go one direction

Finding 20% off is fine; finding the original price after a discount is a wall. Reverse percent exposes ritual.

### Two-step equations get one step

3x + 7 = 22 becomes x = 22 - 7 + 3 or similar improvisations. Balance thinking never got installed.

### Circumference and area formulas swap

2πr and πr² assigned by coin flip means neither was ever built, just memorized side by side.

### Fractions in equations trigger panic

x/3 + 2 = 7 freezes a child whose fraction foundations are rented, not owned.

### Probability answers are vibes

"50/50, it either happens or it doesn't" signals the counting model of chance never landed.

### Homework answers change when you ask why

A correct answer that dissolves under one "why?" was pattern-matched, not reasoned, and tests punish exactly that.

### Algebra placement is looming

If your district decides grade 8 algebra this year and you are unsure of readiness, that is a diagnostic question with a deadline.

Three or more of these? A diagnostic hour finds the exact gaps. Our **demo class doubles as that diagnostic**, and it is free.

How we teach grade 7

## One idea, many costumes.

Grade 7 looks like six unrelated topics. Taught properly, it is two big ideas, proportionality and the completed number system, wearing different costumes. We teach the ideas once, deeply, then let the child recognize them everywhere. Recognition is what transfers to tests; six memorized mini-topics do not.

### Proportionality as one picture

Tables, graphs through the origin, and the constant k. Percent, scale drawings and unit rates all taught as the same machine.

### Sign rules, derived

Negative times negative comes from pattern continuation the child extends themselves, so the rule has a proof attached.

### Equations as balance

Two-step equations solved by legal moves on a balance, so "do the same to both sides" is a physical instinct before it is a rule.

### Geometry from measurement

Circumference discovered by measuring circles until π appears; angle rules found, not announced.

### Live, interactive, out loud

Your child predicts, computes, draws and defends the whole hour. "Convince me" is our most-used phrase.

### One mentor toward placement

The same teacher every class, tracking readiness against the algebra-placement bar your district actually uses.

Watch the method work

## The discount-plus-tax problem, solved like an adult.

Worked example · percent multipliersA $60 hoodie is 25% off. Sales tax is 8%.What do you actually pay?

**The grade-school route:** find 25% of 60, subtract, find 8% of that, add. Four steps, three chances to slip, and no reusable idea.

**How our mentor teaches it:** percent change is multiplication. "25% off" means you pay 75%, one multiplier: × 0.75. "Plus 8% tax" means × 1.08. Chain them.

60 × 0.75 = 45 (the sale price)45 × 1.08 = 48.60 (with tax)Or in one line: 60 × 0.75 × 1.08 = $48.60

Now the payoffs cascade. Reverse problems become divisions: "paid $48.60 with 8% tax, what was the sticker?" is ÷ 1.08. Repeated growth in grade 8, compound interest in high school, exponential functions later: all just multipliers chained. One idea, learned once, working for years.

**The parent test:** ask your 7th grader why 25% off means times 0.75. A reason means understanding; silence means ritual.

[Watch real recorded classes](/how-we-teach)The complete grade 7 map

## Every math topic a 7th grader is expected to master.

The full Common Core-aligned picture of seventh-grade mathematics. Our mentors diagnose against this map, and the grade 6 foundations beneath it, then close the exact gaps.

### Ratios & Proportional Relationships

| Skill | What mastery actually looks like |
| --- | --- |
| Unit rates with fractions | Computes rates like (1/2 mile) per (1/4 hour) and interprets them, the grade 7 upgrade of grade 6 rates. |
| Recognizing proportionality | Tests tables and graphs for proportionality, straight line through the origin, and explains what breaks it. |
| Constant of proportionality | Finds k in tables, graphs, equations and stories, and writes y = kx, slope's direct ancestor. |
| Percent problems, all directions | Handles discount, markup, tax, tip, commission, simple interest, percent increase and decrease, and percent error, forwards and in reverse. |

### The Number System

| Skill | What mastery actually looks like |
| --- | --- |
| Adding and subtracting rationals | Adds and subtracts negatives and fractions on the number line, understanding subtraction as adding the opposite. |
| Multiplying and dividing rationals | Uses the sign rules with a reason attached, and knows why division by zero is undefined. |
| Decimals from fractions | Converts fractions to decimals by division and recognizes terminating versus repeating. |
| Complex expressions | Evaluates multi-operation expressions with rationals, keeping every sign honest. |

### Expressions & Equations

| Skill | What mastery actually looks like |
| --- | --- |
| Equivalent expressions | Expands, factors and combines like terms with rational coefficients, and sees why 0.05x + x is 1.05x. |
| Two-step equations | Solves px + q = r and p(x + q) = r fluently, by balance, including fractional coefficients. |
| Two-step inequalities | Solves and graphs them, and explains why the sign flips when multiplying by a negative. |
| Modeling with equations | Turns word problems into equations and back, the skill that IS algebra readiness. |

### Geometry

| Skill | What mastery actually looks like |
| --- | --- |
| Scale drawings | Computes lengths and areas from scale drawings and redraws at different scales, proportionality in picture form. |
| Angle relationships | Uses supplementary, complementary, vertical and adjacent angles to find unknowns with simple equations. |
| Circles | Knows where 2πr and πr² come from, and uses them without swapping. |
| Area, surface area, volume | Solves real problems with 2D and 3D figures, including cross-sections of solids. |

### Statistics & Probability

| Skill | What mastery actually looks like |
| --- | --- |
| Sampling | Understands why random samples generalize and biased ones mislead, and estimates population facts from samples. |
| Comparing populations | Compares two data sets using centers and spreads, informally judging whether a difference is meaningful. |
| Probability models | Assigns probabilities between 0 and 1, builds uniform and non-uniform models, and compares predictions to observations. |
| Compound events | Uses lists, tables and tree diagrams to count outcomes and find probabilities of combined events. |

The grade 7 wall

## Why negative times negative is positive, with a proof a 12-year-old owns.

Worked example · deriving the sign ruleWhat is (-3) × (-4), and why?

**The chant version:** "negative times negative is positive, so 12." Fine, until the same chant gets applied to -3 + (-4) and produces +7. Chants do not know which operation they belong to.

**How our mentor teaches it:** build the pattern and let the child extend it. Start with what they trust:

3 × (-4) = -122 × (-4) = -81 × (-4) = -40 × (-4) = 0-1 × (-4) = ? (each step ADDS 4... so +4)-2 × (-4) = +8-3 × (-4) = +12

The child discovers the rule by continuing a pattern they verified themselves. Now it has a proof attached, it cannot leak into addition, and when algebra floods the page with minus signs next year, this student places them with confidence while the chanters guess. Ten minutes of teaching, years of dividends.

The first three months

## A journey with a map, not an endless subscription.

### Weeks 1-2 · Diagnose and win

The free demo doubles as a diagnostic against the grade 7 map and grade 6 foundations. Early classes bank wins where the child is nearly solid.

### Month 1 · The number system, completed

Rational arithmetic with the sign rules derived from patterns, then drilled to fluency, because everything after runs on it.

### Month 2 · Proportionality, everywhere

The constant k across tables, graphs and stories, then percent in all directions with multipliers, then scale drawings, one idea in all its costumes.

### Month 3 · Equations and geometry

Two-step equations and inequalities to fluency by balance, then angle relationships and circles as equation practice with pictures.

### Ongoing · The algebra runway

Strong finishers preview linear functions and slope, arriving in grade 8 already conversant. Monthly billing, re-decided every four weeks.

Inside a class

## One full hour, minute by minute.

### Minutes 0-5 · Retrieval warm-up

Quick rational-arithmetic and proportion problems from previous weeks. Retrieval makes skills permanent.

### Minutes 5-20 · The new idea, modeled

Pattern tables, balances or proportion graphs on a shared screen, with the child predicting before every reveal.

### Minutes 20-40 · Guided practice

Problems solved together with support fading, every answer challenged with "convince me".

### Minutes 40-52 · Independent solving

The child works alone while the mentor watches the process live, catching sign slips at the exact step they happen.

### Minutes 52-60 · Teach-back and preview

The child explains today's idea in their own words and takes a short practice set. Every class recorded for revision.

The school-year map

## What grade 7 covers, month by month, in most US classrooms.

| When | What school teaches | Where children wobble |
| --- | --- | --- |
| Aug-Oct | Rational-number addition and subtraction, then multiplication and division | Sign rules chanted, scrambled across operations |
| Oct-Dec | Expressions, combining like terms, two-step equations and inequalities | Balance thinking missing; the inequality flip memorized blind |
| Dec-Feb | Proportional relationships, constant of proportionality, unit rates with fractions | Cross-multiplication without the relationship; k never visualized |
| Feb-Apr | Percent in all directions: discount, markup, tax, interest, percent error | Reverse percent problems; multi-step percent stacking |
| Apr-May | Geometry: scale, angles, circles, volume; statistics and probability | Formula swapping; probability by vibes |
| May-Jun | Review, state testing, algebra-placement decisions in many districts | Placement pressure meets October sign-rule gaps |

**The stakes window is the whole spring:** proportionality lands December to April, and algebra placement often gets decided on it. A child supported through fall arithmetic owns the spring.

Diagnosed daily

## The six grade 7 misconceptions we fix most often.

### "Two negatives make a positive" applied to addition

-3 + (-4) answered as +7. The chant belongs to multiplication only; the number line keeps addition honest.

### "Percent of the new price, percent of the old, same thing"

A 20% drop then 20% rise does not return home. Multipliers, x0.8 then x1.2, make the asymmetry visible.

### "Flip the inequality whenever a negative appears"

Over-applied ritual. Built properly from "multiplying by -1 reverses order on the line", it fires only when it should.

### "Proportional means it goes up"

Any increasing table gets called proportional. The test, straight line through the origin, constant ratio, gets installed with counterexamples.

### "2 pi r and pi r squared are interchangeable"

Distance around versus space inside. Measuring real circles until pi appears makes the two formulas unswappable.

### "Probability 1/2 because it happens or it doesn't"

The two-outcomes fallacy. Counting equally likely outcomes with lists and trees rebuilds chance from the ground.

One more, because equations

## The two-step equation, solved by balance instead of moves.

Worked example · 3x + 7 = 22Solve: 3x + 7 = 22

**The moves version:** "move the 7 over and flip its sign, then move the 3 under." Works until 7 - 3x = 22, where the memorized moves produce chaos.

**How our mentor teaches it:** the equation is a balanced scale. Three mystery boxes and 7 ounces on the left, 22 ounces on the right. What legal moves keep it balanced?

3x + 7 = 22Remove 7 from BOTH pans: 3x = 15Split BOTH pans into 3: x = 5Check: 3(5) + 7 = 22 ✓

"Do the same to both sides" stops being a rule and becomes physics. Fractional coefficients, negatives, variables on both sides in grade 8: all just more of the same legal moves. And the check at the end builds the self-verifying habit that algebra grades quietly reward.

The Modern Age Coders difference

## The only tutors who can turn grade 7 math into working code.

Every mentor here teaches mathematics and coding both, and grade 7 concepts practically ask to be programmed. Percent multipliers become the discount calculator the child builds and ships. Probability becomes a dice simulator they run ten thousand times to watch the theory land. Proportionality becomes the scaling logic of a drawing app.

At this age, "when will I ever use this?" deserves a real answer, and building the answer beats being told it. Ideas met twice, in class and in code, become intuition, and intuition is what walks confidently into algebra.

[Teens · codingPython Complete Masterclass for Teens](/courses/python-complete-masterclass-teens)[Parents guideWhat Kids Coding Classes Cost](/coding-classes-for-kids-cost)[ProofLive Projects Our Students Built](/student-labs)

Both subjects, one school, one mentor relationship, one monthly bill.

While we do the teaching

## Six things parents of 7th graders can do at home.

### Hand over the discount math

"This is 30% off and tax is 7%, what do we pay?" Let them own the answer at the register. Real stakes, real percent practice.

### Talk rates on road trips

"We did 150 miles in 2.5 hours, what is our pace? When do we arrive?" Unit rates in their natural habitat.

### Ask what k is

When proportion homework appears, one question, "what is the constant here, and what does it mean?", does more than an hour of hovering.

### Play games with real probability

Card and dice games invite "what are the odds of that?" conversations that quietly build the counting model of chance.

### Know your district's placement rules

Ask the school now how algebra-in-grade-8 is decided. It is the highest-leverage email a grade 7 parent can send.

### Respect the check

When they verify an answer by substituting back, notice it out loud. The checking habit is worth more than any single correct answer.

The honest part

## Who this genuinely fits, and who it does not.

### A strong fit if…

• Your child is behind on proportional reasoning built as one idea, sign rules derived rather than chanted, and equations made fluent before algebra, not re-drilled.

• Your child is coasting at school and needs depth and challenge before boredom becomes a habit.

• Homework has become a nightly negotiation and you want a calm expert to take over the teaching.

• You want one mentor who knows your child, not a rotating cast or an app with streaks.

### Honestly not the fit if…

• Your child cannot yet engage with a screen and a teacher for a full hour. By grade 4 nearly every child can, provided the hour is genuinely interactive, and ours are.

• You want homework done *for* the child. We teach the child to do it, which is slower on night one and far faster by week four.

• You are looking for a test-cram sprint. Grade 7 is about owning proportionality and the completed number system; cramming a twelve-year-old is counterproductive and we will say so.

Structured paths

## The courses behind the tutoring.

Every mentor teaches from a structured curriculum, adapted live to your child. If you prefer to see the full syllabus before you start, these are the programmes grade 7 students join.

[Grades 6-8 · core pathMiddle School Mathematics Mastery Program](/courses/comprehensive-middle-school-mathematics-mastery)[The next stepHigh School Mathematics Mastery Program](/courses/complete-high-school-mathematics-mastery)[For the child who wants moreOlympiad & Competition Mathematics](/courses/olympiad-competition-mathematics-mastery)Pricing

## Premium teaching. One honest price.

You are paying for a real teacher, live, for a full hour, twice a week, the same format US tutoring centers charge $300 to $450 a month for. Our cost base is global, so the price is not.

### 1:1 Private Mentorship

$150 / month

- 8 live one-hour classes a month, 2 per week
- A dedicated mentor who knows your child by name
- Diagnostic-led plan against the full grade 7 map
- Class recordings for revision · cancel any time

### Small-Group Class

$100 / month

- 8 live one-hour classes a month, 2 per week
- A handful of children at the same level
- Same teaching method, gentle peer energy
- Recordings included · cancel any time

[See the middle school course](/courses/comprehensive-middle-school-mathematics-mastery)

That is **$18.75 per dedicated hour** of 1-on-1 teaching, or $12.50 in a small group. No registration fee, no contract, and a free demo before any payment. [Read our zero-risk promise](/guarantee) or compare with [what US math tutoring costs in 2026](/online-math-tutor-cost).

Who teaches your child

## Mentors who teach the why, in classes kids wait for.

Our mentors are trained in one method: understanding before procedure, concrete before abstract, the child talking more than the teacher. They teach both maths and coding, which matters more than it sounds, because a mentor who can turn "4 groups of 6" into a game your child wants to build has engagement tools a worksheet never will.

And because the same mentor stays with your child month after month, teaching compounds. They know that your daughter rushes when unsure, that your son shuts down after two wrong answers, and exactly which idea to revisit before it becomes a gap.

[**Meet the team behind the teaching →**](/team)

"My child Dhairya is really enjoying the classes. This is his first online class, and he eagerly looks forward to it. I can see his improvement."

Sonam Oswal, mother of Dhairya · verified Google review

"My son struggled with math for years. Integrating it into coding projects has transformed his understanding and confidence. Highly recommended!"

Shewta Singh, mother of Ishan · verified Google review

[Read all 547 Google reviews →](https://g.page/r/Cff_QkHNaP9yEAE/review)

An honest comparison

## Your real options for a struggling 7th grader.

| Option | Typical cost | What it really is | Best for |
| --- | --- | --- | --- |
| Modern Age Coders | $100-$150 / month | 8 live one-hour classes with a dedicated mentor, concrete-first teaching | Rebuilding understanding and confidence, sustained progress |
| Mathnasium center | $300-$450 / month + enrollment fee | Drop-in worksheet floor with rotating instructors | Children who focus better out of the house |
| Kumon | $150-$220 / subject / month | Daily worksheet packets, brief check-ins, no taught lessons | Building a drill habit and calculation speed |
| Local private tutor | $35-$80 / hour | Quality varies; twice-weekly quickly costs $280-$640 a month | Short-term help when you have found a gem nearby |
| Math apps | $10-$20 / month | Gamified practice, no teacher, no accountability | Casual practice between real lessons |

Competitor figures are typical published US prices as of July 2026 (tutors.com, brighterly.com). See our full comparisons: [vs Mathnasium](/modern-age-coders-vs-mathnasium) · [vs Kumon](/modern-age-coders-vs-kumon) · [best online math tutoring 2026](/best-online-math-tutoring-2026).

Parent questions

## Everything parents of 7th graders ask us.

How do I know if my 7th grader is actually behind?

Four markers: can they explain why 25% off means times 0.75, solve 3x + 7 = 22 and check it, say why negative times negative is positive with a pattern, and recognize whether a table is proportional with a reason? Wobbly on two or more matters this year more than most, because algebra placement is often decided on grade 7. Our free demo doubles as this diagnostic.

Is grade 7 really the year that decides algebra placement?

In many US districts, yes: grade 7 performance and spring assessments decide who takes Algebra 1 in grade 8, which shapes the whole high-school math transcript and AP timeline. Ask your school how placement works now, while there is time to act on the answer.

My child chants the sign rules but keeps making sign errors. Why?

Because chants do not know which operation they belong to. "Two negatives make a positive" is true for multiplication and false for addition, and a chanting child applies it everywhere. We derive the rules from patterns the child extends themselves, which locks each rule to its operation.

How long does catching up take?

A child solid on grade 6 who needs the grade 7 ideas built usually gets there in six to ten weeks of twice-weekly classes. A child with integer or fraction debts needs a term. The diagnostic tells us which, and monthly billing means you re-decide every four weeks.

Do you prepare for algebra placement tests specifically?

Yes. Placement assessments test proportional reasoning, rational arithmetic and equation fluency, exactly the engines we build. In the weeks before the test, mentors fold in format practice. We will also tell you honestly if another year of pre-algebra would serve your child better than forcing the track.

Who teaches, and is it the same person every time?

A dedicated mentor, the same one every class, tracking your child against the full grade 7 map and the placement bar. Meet the team on our team page and watch recorded classes first.

What does it cost, exactly?

1-on-1 is $150 a month, small group is $100 a month, both with 8 live one-hour classes (2 per week) and recordings included. No registration fee, no contract, cancel any month. The first class is a free live demo, no card needed.

Is this aligned with my child's school?

Yes. We teach against the Common Core grade 7 structure US state standards follow: ratios and proportional relationships, the number system, expressions and equations, geometry, statistics and probability.

My child hates showing work. Does it matter?

In grade 7, enormously. Multi-step problems punish mental juggling, and next year algebra grades the work itself. We rebuild showing-work as thinking-on-paper rather than a teacher tax, and resistance usually fades when the method starts earning marks.

What if my child is ahead?

Grade 7 is the classic acceleration year: we deepen proportional reasoning, preview linear functions and slope, and open the Olympiad and competition track. Strong students leave grade 7 already fluent in half of grade 8.

Can you also help with the science-class math?

Yes. Grade 7 science quietly demands unit conversion, rates and proportional reasoning, the same engine we build. Mentors happily use science homework as applied practice.

Can we try before paying anything?

Yes. Every family starts with a free live demo class, no card details, no obligation, and it doubles as the diagnostic. The promise is written on our guarantee page.

Speak grade 7

## The terms on your child's worksheets, decoded.

### Proportional relationship

Two quantities with a constant ratio: double one, the other doubles. Graphs as a straight line through the origin.

### Constant of proportionality

The k in y = kx: the unit rate wearing algebra clothes, and slope's direct ancestor.

### Rational number

Any number writable as a fraction, positive or negative, including decimals that end or repeat.

### Additive inverse

The opposite that sums to zero: -3 and 3. Why subtraction is adding the opposite.

### Percent multiplier

The one-step version of a percent change: 25% off is x0.75, 8% tax is x1.08. Chainable and reversible.

### Markup and markdown

Percent increase and decrease in shop language, computed with multipliers, not four-step rituals.

### Simple interest

I = prt: principal times rate times time, percent reasoning meeting money.

### Like terms

Terms with identical variable parts: 3x and 5x combine; 3x and 3x squared do not.

### Vertical angles

The opposite angles where two lines cross, always equal, and the seed of angle-chasing proofs.

### Circumference

Distance around a circle: 2 pi r. Discovered by measuring, not memorizing, so it never swaps with area.

### Sample vs population

The part you measured versus the whole you care about, and why random sampling is the bridge.

### Compound event

Two or more events together, counted with lists, tables and tree diagrams before any formula.

Keep exploring

## More math help from Modern Age Coders.

[Last year6th Grade Math Tutor](/online-math-tutor-6th-grade)[Next year8th Grade Math Tutor](/online-math-tutor-8th-grade)[Behind at schoolMath Catch-Up Program](/math-catch-up-program)[Looking aheadAlgebra 2 Tutoring](/algebra-2-tutoring-online)[Cost guideWhat Math Tutoring Costs in 2026](/online-math-tutor-cost)[Ranked guideBest Online Math Tutoring 2026](/best-online-math-tutoring-2026)

## Watch one full hour of real teaching. Free.

Book the demo class. Your child gets a real lesson with a real mentor, you get a diagnostic against the complete grade 7 map, and nobody asks for a card. If your child does not leave the hour lighter about math, walk away with our thanks.

[Watch real classes first](/how-we-teach)

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