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Royal Borough of Kensington and Chelsea

Coding classes in Kensington and Chelsea

What are the best coding classes in Kensington and Chelsea?

Kensington and Chelsea is the west London borough of South Kensington, Notting Hill, Chelsea, Earl's Court, Holland Park, North Kensington and Kensal Green, with 143,375 residents at the 2021 Census and eighteen Grade I entries, from Kensington Palace and the V&A to Cosmic House with its Solar Stair. The classes to look for turn a small, curious fact into real mathematics, and this page does it with the calendar: a staircase of 52 steps is one day short of a year, and learners find out, with code, how leap years, weekday cycles and continued fractions keep our dates in line. The teaching is done live, over video, by teachers working from India; learners range from six to sixty-seven and learn alone or in a matched set of five to ten. Lesson one is on the house; staying on means USD 100 each month for a group seat, or USD 150 each month for private lessons.

Historic England's list entry for Cosmic House, listed at Grade I in 2018, describes a staircase at its heart called the Solar Stair. It has 52 steps, one for each week of the year, and each step is divided into seven, one for each day. Count them: 52 times 7 is 364. The real calendar year is 365 days, or 366 in a leap year, so the stair is always a day or two short. That gap is where our learners start. They use Python's calendar to find that 400 years of our calendar contain exactly 97 leap years and exactly 20,871 weeks, so the whole pattern of weekdays repeats every four centuries. They discover that the 13th of the month is a Friday slightly more often than any other day. And they use continued fractions to find the neatest leap-year rules possible.

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Facts last verified 25 September 2026. Teaching is online; no Kensington and Chelsea branch is claimed.

Course picks for Kensington and Chelsea

Courses to start with here

Think of a Year 2 child in Notting Hill who counts down the days to a birthday, a Year 8 pupil in Chelsea who wants to know why February is odd, a Year 12 student in South Kensington heading for maths or physics, and a retired architect in Holland Park fascinated by buildings that encode ideas. Each can begin with a free lesson.

Scratch Coding for Kids course thumbnail
Ages 6 to 10

Scratch Coding for Kids

A Scratch calendar that counts days and weeks, and a game that guesses what weekday a birthday falls on.

See the syllabus
 Python and AI for Kids course thumbnail
Ages 9 to 12

Python and AI for Kids

First Python with dates: leap years, days between two dates and the weekday of any day in history.

See the syllabus
 Python for Teens course thumbnail
Ages 13 to 18

Python for Teens

Python for Key Stages 3 to 5, including modular arithmetic and the continued fractions project on this page.

See the syllabus
 Data and AI Analytics for Non-Programmers (Excel, Sheets, Power BI) course thumbnail
Adults

Data and AI Analytics for Non-Programmers (Excel, Sheets, Power BI)

For adults who want to understand the arithmetic under every date calculation their software makes.

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Browse the course atlas for more than one hundred options and use the coding roadmap to check prerequisites.

The four we are known for

Python, AI, vibe coding and agentic coding

These run underneath everything above. Every one is live and online, placed by ability rather than by age, and the first class is free.

Vibe Coding for Teens course thumbnail
Vibe codingAges 13 to 17

Vibe Coding for Teens

Python, web and AI projects where the learner still owns the thinking.

See the syllabus
 Python Automation Course course thumbnail
Python and AICollege and adult

Python Automation Course

Automate the work you already do, then let AI carry part of it.

See the syllabus
 AI and Machine Learning for Teens course thumbnail
AI and MLAges 14 to 18

AI and Machine Learning for Teens

Train a model, read what it learned, and be able to say why it is wrong.

See the syllabus
 Codex & Claude Code course thumbnail
Agentic codingProfessionals

Codex & Claude Code

Run AI coding agents on real work without losing control of the codebase.

See the syllabus
The borough in numbers

143,375 residents and 1,339 listed entries

Published figures appear as their owners publish them; where we counted from open data, we say so.

Four facts about the Royal Borough
AboutNumberAccording to
Residents at the 2021 Census143,375ONS table TS001
Listed entries within the borough, by our count1,339, including 18 at Grade I and 116 at Grade II*Historic England, 25 September 2026
Steps in the Solar Stair at Cosmic House52, each divided into sevenHistoric England list entry 1450124
Lines at South KensingtonCircle, District and PiccadillyTfL open data, checked 25 September 2026

Palaces and museums

Kensington Palace and its Orangery, the Victoria and Albert Museum, and the front lodge and gates of the Natural History Museum are Grade I.

Houses

Holland House, the Tower House, Cosmic House and Debenham House, built in 1905 to 1907 by Halsey Ricardo with tiles by William de Morgan in its garden house, are Grade I.

Chelsea

The Royal Hospital's main buildings, its entrance gates and the statue of Charles II in its courtyard are Grade I, as is Chelsea Old Church.

The data

Our calendar, checked by a computer

Python comes with a calendar that follows the leap-year rule used in the UK: every fourth year, except century years, unless the century divides by 400. Learners use it as their reference and test it.

What 400 years of the calendar contain, 2001 to 2400
CountResult
Leap years97
Days146,097
Weeksexactly 20,871
Months4,800
Months whose 13th is a Friday688, more than any other weekday

Because 146,097 days divide exactly into weeks, the weekday pattern repeats every 400 years: 13 September 2426 falls on the same weekday as 13 September 2026. Inside that cycle the seven weekdays are not quite equal. Fridays get the 13th 688 times, Wednesdays and Sundays 687, Mondays and Tuesdays 685, Thursdays and Saturdays 684. The differences are tiny, but they are real, and they come straight from the leap-year rule.

We would have listed the borough's libraries here; the council's libraries page turned our automated reader away with an access error, and we never work around such blocks, so none are named. The Royal Borough's own website has the list.

Signature project

From a 364-day staircase to the neatest leap-year rules

Learners measure how fast a calendar drifts, then use continued fractions to find the simplest rules that keep it in step.

1. How far off?

A 364-day year falls about 1.24 days behind our calendar's average every year. In about 73 years that adds up to a quarter of a year: the seasons would slide by a whole season.

2. The leap share

Our calendar adds 97 leap days in 400 years, an average of 0.2425 extra days a year. The question is how to approximate that fraction with simple rules.

3. Continued fractions

Break 97/400 into a continued fraction and read off its convergents: the simplest fractions that come closest for their size.

Convergents of 97/400, computed 25 September 2026
RuleLeap years per cycleAverage extra days a yearDrifts one day from our calendar every
Every fourth year1 in 40.25about 133 years
8 in 338 in 330.2424...about 13,200 years
Our calendar97 in 4000.2425never, by definition

The continued fraction of 97/400 is 0; 4, 8, 12. Its first convergent, 1/4, is the simple every-fourth-year rule, which runs ahead by three days every four centuries. The next, 8/33, uses a 33-year cycle and stays within a day of our calendar for about 13,200 years, while needing a far shorter cycle than 400. This is exactly what continued fractions are for: finding the simplest fractions that approximate a number well. The same idea designs gear trains, tunes musical scales and approximates pi.

Why an AI answer is not enough

An AI assistant can recite the leap-year rule. A learner who has counted 146,097 days in code, found the Friday the 13th surprise, and derived 8/33 from a continued fraction understands why the rule looks the way it does, and could design a new calendar rule themselves. Knowing where a rule comes from is what lets someone spot the date bugs that still catch out real software.

The maths underneath

Clock arithmetic for days of the week

Weekdays wrap round every seven days, just as hours wrap round every twelve. That makes the calendar a perfect playground for modular arithmetic.

Remainders

365 days leave a remainder of 1 when divided by 7, so a date usually moves one weekday later each year; after 29 February it moves two.

Cycles

146,097 leaves no remainder when divided by 7, which is why the full cycle is exactly 400 years.

Closest fractions

Continued fractions come from repeatedly taking the whole part and flipping the remainder, the same step used in Euclid's algorithm.

GCSE maths students can work with remainders, cycles and the drift calculation; A-level students can derive continued fractions and prove why convergents are the closest approximations of their size. The Solar Stair details come from Historic England's list entry; every count and fraction on this page was computed by us on 25 September 2026 with Python's standard calendar. Historic England, the Royal Borough of Kensington and Chelsea, TfL and the ONS have no connection with Modern Age Coders.

Getting around

South Kensington, and a laptop at home

The borough's museums draw visitors from everywhere. Our learners do not need to travel at all.

South Kensington

TfL's open data lists the Circle, District and Piccadilly lines at South Kensington.

Kensal Green to Chelsea

A learner at the northern edge of the borough and one by the river in Chelsea can share a class from home.

A weekly rhythm

Like the Solar Stair, our classes keep a steady weekly pattern: two evenings, a group of five to ten at one stage.

Kensington and Chelsea among the boroughs

Kensington and Chelsea is one of London's 32 boroughs. The London page lists them all with the City, linking each page when it goes live, including Hammersmith and Fulham to the west.

Learning ladder

From counting days to continued fractions

We place each learner by what the free lesson shows, not by their year group alone.

Ages 6 to 10

Days and weeks

Children build Scratch calendars and countdowns and notice patterns in the days of the week.

Scratch Coding for KidsCoding for Kids
Ages 10 to 13

Leap years

Python that tests leap years, counts days between dates and finds weekdays with remainders.

Python and AI for KidsMaths Through Coding
Ages 13 to 18

Cycles and fractions

Modular arithmetic, 400-year cycles and continued fractions, excellent preparation for maths competitions and A level.

Python for TeensFull Stack Web Development for Teens
Ages 18 to 67

Dates done right

Adults learn the arithmetic behind dates and why date calculations in software so often go wrong.

Data and AI Analytics for Non-Programmers (Excel, Sheets, Power BI)Python Automation Course
Coding and AI

AI knows the leap-year rule. Why should a Kensington and Chelsea teenager derive it?

Because rules that are understood can be checked, and dates are where software quietly breaks.

AI coding assistants handle dates by pattern: they will usually use a library, and usually get it right. When they do not, the bug can hide for years, surfacing on 29 February or at a century boundary. A learner who has counted the 400-year cycle, measured the drift of a 364-day year and derived the leap rules from continued fractions knows exactly what to test. That kind of understanding is how people catch the errors that automated code makes.

Continued fractions and modular arithmetic also reach well beyond calendars, into cryptography, music and engineering. Tools will keep generating code; people who know the maths underneath will keep being the ones who trust it for good reason.

Cosmic House built the year into a staircase. A learner from this borough who can build the calendar into code has understood something architects and astronomers have puzzled over for centuries. The longer argument is in why teenagers should still learn to code in 2026.

Delivery

Notting Hill to Chelsea, lessons live

Wherever a learner lives in the Royal Borough, their lesson is a video call away.

From home

A laptop or desktop, headphones and a broadband connection that can carry video are enough to join.

Stages in England

Reports talk the language of a Kensington school: Key Stage 2 or 3, GCSE, A level. The lessons themselves are always taught in English.

A free lesson first

Real teaching, not a sales call, finishing with a suggested level and course. Card details are never requested for it.

Groups by level

A class is formed from learners at one stage wherever they live, five to ten of them, and that wide net is what makes a good evening slot possible.

Two evenings a week

Two lessons in the evening each week is normal; school holidays and exam weeks bring agreed breaks.

UK clock

Teachers work from India; every time we send is in UK time.

A smaller borough, a wider class

About 143,000 people live in Kensington and Chelsea, and a good class still needs five learners at the same stage free together, so ours draw from far beyond it.

Fees

Fees for Kensington and Chelsea families

The first lesson is free; then there is one monthly fee throughout the Royal Borough.

First classUSD 0

A full first lesson with a teacher, free, ending with a recommended level, course and time.

Group tuitionUSD 100

About eight live lessons a month in a class of five to ten at one stage.

Private tuitionUSD 150

About eight live lessons a month, one to one.

The monthly fee is set in US dollars for every family outside India, so this site never shows a price in pounds. There is no bill at all until the free lesson has happened and you have settled on a course and a fixed weekly slot. The pricing page explains pausing, missed lessons and changing between group and private teaching.

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Reviews

Reviews from families, as posted on Google

Rated 4.9 across 547 Google reviews. These are real reviews, reproduced as written.

★★★★★

"The one step solution for my son. Modern Age Coders make learning coding so simple that kids love it. The teachers explain complex concepts clearly with practical exercises and interactive content."

Ria Mukherjee

Parent

★★★★★

"Modern Age Coders has been a game-changer for me. I struggled to grasp IT concepts and coding before joining, but their classes transformed everything. I can now confidently write complex programs with ease."

Samriddha Mondal

Student

★★★★★

"One of the most wonderful education centres out there. Education is not limited to school syllabus but focuses on skill development."

Vansh Agarwal

Student

★★★★★

"My child Dhairya is really enjoying the Modern Age Coders classes. This is his first online class and he eagerly looks forward to it. I can already see his improvement, and the teachers are very cooperative."

Sonam Oswal

Parent of Dhairya

★★★★★

"Modern Age Coders have wonderful teachers who teach in a clear, easy and practical way. The teacher boosts students' confidence and inspires them to learn without hesitation."

Sonu Goyal

Parent

★★★★★

"I highly recommend this computer coding class! The teachers are incredibly knowledgeable and passionate about coding."

Ritu Kedia

Parent

Free placement class

Request a free lesson

A year group and a favourite hobby let us prepare properly. The first lesson might be a Scratch countdown, a Python leap-year tester, or the calendar project on this page.

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FAQ

Kensington and Chelsea questions

About the borough, the calendar project and our lessons.

How many people live in Kensington and Chelsea?

The 2021 Census counted 143,375 usual residents in the Royal Borough of Kensington and Chelsea, in ONS table TS001.

What is the Solar Stair?

A staircase at the centre of Cosmic House, a Grade I house remodelled by Charles Jencks with Terry Farrell Partnership. Historic England's list entry says it has 52 steps, one for each week, each divided into seven for the days.

Why does the calendar repeat every 400 years?

Because 400 years of our calendar contain 97 leap years and 146,097 days, which is exactly 20,871 weeks. After that, every date falls on the same weekday again.

Is Friday the 13th really more common?

Very slightly. In a 400-year cycle, the 13th falls on a Friday 688 times, one more than Wednesday or Sunday and up to four more than other days.

What is a continued fraction?

A way of writing a number as a whole part plus one over another whole part plus one over another, and so on. Stopping early gives the simplest fractions that approximate the number well; for 97/400 they are 1/4 and 8/33.

When are lessons held?

With the level known from the free lesson, we point you to a class that has a seat and meets on a fixed weekday evening, always quoted in UK time; the teacher is in India.

What equipment is needed?

Nothing unusual: any computer that plays sound, with an internet line that does not keep dropping. The calendar project needs only Python.

Is there a Modern Age Coders centre in Kensington and Chelsea?

No. There is no Kensington and Chelsea centre and no premises anywhere in the UK, because every lesson is live online. A learner needs a computer with sound and a stable connection, and our phone number is Indian.

What do coding classes in Kensington and Chelsea cost?

The first lesson is free. After that, a group place costs USD 100 a month for two live lessons a week, about eight a month, with five to ten learners, and one-to-one teaching on the same timetable costs USD 150 a month. Nothing is charged until the course, format and time are agreed.

How are the groups made up?

By level, pace and goals rather than by age or neighbourhood, with five to ten learners at one stage. Where no group fits the learner's week, one-to-one lessons are offered.

Explore London

Other London boroughs

Every borough and the City has a place on the London page, with a link as each page is published, from Greenwich to Islington. Pattern-spotting of this kind leads naturally to machine learning, taught in our London classes, and anyone moving between England and the other UK nations can line up school years on the UK coding page.

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