Peru · Age 12 · 1° de secundaria · Live, in English
Coding for kids age 12 in Peru
Twelve sits on a border. In Peru it usually means the first year of secundaria, a new timetable, new teachers and, for some, a first maths olympiad. In coding it means the end of children's tools and the start of real ones. Here we write for mothers and fathers hoping to see a twelve year old to cross that border with a teacher beside them, live and in English.
Live classes since 2020 · 4.9 average from about 547 Google reviews · twelve year olds build real projects and explain them in English
In short
A twelve year old in Peru is ready for real programming, and Modern Age Coders teaches it live, online and in English. At twelve most of our students write Python projects with functions and lists, and some move on to game engines, C++ for contests or maths through code. Lessons are led from India by a mentor who shares the screen with your child, either in a class of fifteen to twenty young people born around the same year or one to one, and the hour is whatever your household in Peru prefers. There is no charge for the first lesson.
Where twelve year olds start
Good first courses at twelve
Twelve is the top of our kids' range and the edge of our teens' courses. These three are the usual first choices.
Who are these coding classes for twelve year olds for?
Families in Peru whose child is twelve, usually in their first year of secundaria, and who can follow a class in English or want to grow into it.
Young people who have outgrown blocks
They built Scratch games at nine or ten and now find them too simple. They want to type, to build things that look like real software, and to understand how the apps on their phone work.
Beginners starting late
Twelve is not late. Beginners of this age learn Python faster than younger children, because they read quickly, follow longer explanations and can plan ahead.
Puzzle solvers
Some twelve year olds love the maths more than the screen. Code lets them test conjectures, count cases and see why an algorithm works, which is good training for contests.
The real thing, at a gentler pace. A twelve year old can learn the same ideas an adult beginner learns, as long as each idea arrives with a project that makes it worth learning.
Ideas that click at twelve
Functions. Writing a piece of code once and calling it with different inputs. Twelve year olds like the feeling of building their own tools.
Lists. Keeping many values together and working through them with a loop: scores, names, the numbers in today's lesson.
Algorithms. A precise method that always works, such as a sieve for primes or a search through a sorted list. This is where coding and mathematics meet.
Projects that hold attention
A game with levels and a saved high score. A small website about a hobby. A program that answers a maths question nobody in the class could do by hand.
Twelve year olds lose interest in exercises that lead nowhere. Every topic in our classes ends in something they can show a friend, and every project is explained aloud, in English, at the end.
Twelve is also when many young coders choose a direction: making games, building for the web, or solving contest problems. They do not have to choose for ever. A term of each is a good way to find out, and the free class is a good way to start.
Starting secundaria
What changes when a child in Peru starts secundaria?
A five-year stretch begins, with a new weekly plan and, for those who want it, a new set of contests. The table lines up each grade with MINEDU's normative age and with the ONEM level it competes in.
Secundaria in Peru: grade, normative age on 31 March and ONEM 2026 level
Grade
Normative age (MINEDU)
ONEM level (2026 bases)
1° de secundaria
12
Nivel 1
2° de secundaria
13
Nivel 1
3° de secundaria
14
Nivel 2
4° de secundaria
15
Nivel 2
5° de secundaria
16
Nivel 3
Ages from MINEDU, Edades normativas (normative age counted on 31 March each year). Levels from the bases of the XXII Olimpiada Nacional Escolar de Matemática 2026 as sent to schools by UGEL 06 in an oficio múltiple. Both read on 9 November 2026.
The secundaria plan
Ley 28044 says secundaria "dura cinco años" and gives students "una formación científica, humanista y técnica". Under the regular school day the CNEB gives every grade 4 weekly periods of Matemática, 4 of Comunicación, 3 of Inglés and 2 of Educación para el Trabajo.
With 45-minute periods, that is 180 minutes of mathematics and 135 of English a week, by our sum. There is still no computing area: digital skills remain a competency shared across subjects, so coding at school depends on the school.
What that means for a twelve year old
Secundaria is busier, and there are more teachers to adjust to. Coding classes that run at an hour the family chooses fit round that better than an after-school club fixed to one afternoon.
English at school goes up to three periods a week. A twelve year old who also codes in English gets a lot of practice in precise, technical language, the kind that is hardest to pick up in a general class.
Contests at twelve
Which olympiads can a twelve year old in Peru take part in?
In maths, the ONEM from first grade of secundaria. In computing, the OPI is open to secondary students and gets harder later. We describe them from the organisers' own documents, and we are not connected with any of them.
ONEM, the school maths olympiad
The ONEM 2026 bases put 1° and 2° de secundaria in Nivel 1, with categories Alfa for public schools and Beta for private ones. The school stage ran nationwide on Wednesday 8 July 2026; its paper had ten closed constructed-response items and lasted two hours.
According to El Peruano on 11 October 2026, the 2026 edition drew more than 1.7 million secondary students from its first stage. Entry is through your child's school, which runs the first round; the winners go on to the UGEL, regional and national stages.
OPI, the computing olympiad
The Olimpiadas Peruanas de Computación, organised by UTEC, are "abiertas gratuitamente a todos los estudiantes de secundaria del país". The OPI 2025 rules allowed only C++ in the final, in-person phase and banned generative AI for solving problems.
A twelve year old is early for the OPI final, but not too early to prepare. Python teaches the thinking; C++ comes later for the contest itself. Our page on ONEM preparation explains, in Spanish, how we train with problems we write ourselves.
One more door opens soon after twelve. MINEDU's COAR schools offered 2,650 places in their 2026 admission for public-school students who had finished 2° de secundaria. We mention it only so families know the timeline; we do not prepare for COAR admission and make no promise about any contest or admission result. We never reproduce an organiser's problems; every practice problem we use is our own.
An original Python lesson
How do we teach Python to a twelve year old? A sieve for primes
This is our lesson for twelve year olds who know loops and lists. It is more than two thousand years old, it fits in fifteen lines, and it shows a habit that contest coders need: count the work, not just the answer.
The idea, on paper first
Write the numbers from 2 to 100. Circle 2, then cross out every multiple of 2 after it. Circle the next number not crossed out, 3, and cross out its multiples. Keep going. Whatever is circled at the end is prime. The method is called the sieve of Eratosthenes.
The mentor asks one question before any code: when you reach 7, which is the first multiple you actually need to cross out? Most twelve year olds say 14. The answer is 49, because 14, 21, 28, 35 and 42 were already crossed out by 2, 3 or 5.
In Python
We keep a list of True and False values, one per number: True means "still might be prime". Crossing out means setting a value to False.
Because of the question about 7, each prime starts crossing out at its own square, p * p, and the outer loop can stop once p * p is bigger than the limit. We also count how many numbers get crossed out, as a check.
Version 1: the sieve up to 100Python
limit = 100
is_prime = [True] * (limit + 1)
is_prime[0] = False
is_prime[1] = False
crossings = 0
for p in range(2, limit + 1):
if is_prime[p] and p * p <= limit:
for multiple in range(p * p, limit + 1, p):
if is_prime[multiple]:
crossings = crossings + 1
is_prime[multiple] = False
primes = [n for n in range(limit + 1) if is_prime[n]]
print(primes)
print("Primes up to", limit, ":", len(primes))
print("Numbers crossed out:", crossings)
Our run under Python 3 (python3 -I), unedited. 99 numbers from 2 to 100, minus 25 primes, leaves 74 crossed out, which matches the count.
Then the question that turns a twelve year old into a programmer who thinks about cost: how much work did starting at p * p save? We write a version that can start at either 2 * p or p * p and counts every crossing-out step, even when a number is crossed out twice.
Version 2: the same answer, two amounts of workPython
def count_primes(limit, start_at_square):
is_prime = [True] * (limit + 1)
is_prime[0] = is_prime[1] = False
work = 0
for p in range(2, limit + 1):
if not is_prime[p]:
continue
first = p * p if start_at_square else 2 * p
for multiple in range(first, limit + 1, p):
work = work + 1
is_prime[multiple] = False
return sum(is_prime), work
for limit in [100, 1000, 10000]:
a = count_primes(limit, False)
b = count_primes(limit, True)
print(limit, "primes:", a[0], "| steps from 2p:", a[1], "| steps from p*p:", b[1])
What Version 2 printsOutput
100 primes: 25 | steps from 2p: 146 | steps from p*p: 104
1000 primes: 168 | steps from 2p: 1958 | steps from p*p: 1411
10000 primes: 1229 | steps from 2p: 23071 | steps from p*p: 16981
Exact output of our run. Both versions find the same primes (25, 168 and 1229); starting at p times p saves between about a quarter and nearly 30% of the steps, by our division of the printed counts.
Two answers can be equally right and not equally good. The faster version was not found by typing; it came from the paper question about 7. That is the order we teach in: think, then code, then measure. It is also why AI tools that produce an answer instantly are no use to a twelve year old learning this: the answer was never the point.
Our practice, check by hand. Which numbers below 30 are crossed out more than once in Version 2 when you start at 2p? List them.
Our practice, twins. Use the list of primes to print every pair that differs by 2, like 11 and 13. How many pairs are there below 100?
Our practice, the stopping rule. Explain, in English, why the outer loop may stop once p times p passes the limit.
Our practice, estimate. Without running anything, write down a guess for the number of primes below 100,000. Then run it and compare.
AI at twelve
Can a twelve year old use ChatGPT or other AI for coding?
Not yet. Twelve is one birthday short of the age the main chatbot makers set, and for learning to code that year is a gift rather than a loss.
The rules
OpenAI asks ChatGPT users to be 13 or older, and Google sets 13 for Gemini on personal and school accounts. Anthropic sets 18 for Claude. None of them is for a twelve year old, so we do not use them in class.
What happens at thirteen
In our teen courses, students who have learnt to code first meet AI tools where the maker allows it, with a parent's permission where required, and use them to check and explain, never to replace thinking.
Contest rules agree
The OPI 2025 rules banned generative AI for solving problems. A young coder who can solve problems unaided is ready for that rule and for the real work behind it.
Every major AI tool and the youngest age its maker allows is listed, with quotes from the makers' own terms, in our AI tools age guide.
Peru time
When would a twelve year old in Peru have class?
At an hour your family chooses, around the secundaria day. Peru uses UTC minus five all year and India uses UTC plus five and a half, which puts a mentor in India ten hours thirty minutes later than you, whatever the date. The rows below are conversions, not a schedule.
Peru hours a twelve year old might use, turned into India time (examples, not class slots)
Time in Peru
Time in India
Fits around
07:00
17:30
An early start in the summer holidays
10:30
21:00
A Saturday or Sunday morning
14:00
00:30, next day
An afternoon after a morning school shift
16:30
03:00, next day
The hour after a full school day
20:00
06:30, next day
Evening, once homework is done
Worked out by us from the IANA tz database: America/Lima is UTC minus 5 and has not used summer time since 1994; Asia/Kolkata is UTC plus 5:30.
Neither country moves its clocks, so the hour you pick holds from March to December and through the summer. Every Peru page, by age, subject and place, is on our coding and AI classes in Peru page.
Progress at twelve
How does a twelve year old progress in coding over a year?
These five stages are ours. They decide which group a twelve year old joins and when they are ready for our teen courses at thirteen.
Five stages for twelve year olds (ours)
Stage
Typical timing
Can build
Can explain
1. Fluent basics
Months 1 to 2
Programs with loops, decisions and input
What each line does
2. Own tools
Months 2 to 4
Functions reused across a project
Inputs, outputs and why
3. Data
Months 4 to 6
Programs that keep and search lists
How the program finds an item
4. Algorithms
Months 6 to 9
A sieve, a sort, a search, written from an idea
Why it is correct and how much work it does
5. Projects
Months 9 to 12
A planned project, finished and tested
What they would change next time
For parents
Stage 4 is where coding and school maths meet. A twelve year old who can explain why a method is correct is learning proof, not only programming.
Ask to see the finished project at stage 5, and ask what your child would change. A thoughtful answer is the clearest sign of progress.
For you, at twelve
Count the work, not only the answer. Two programs can both be right; one can be far better.
When you are stuck, write the idea in plain English first. The code is easier after that.
More options
Nine more courses for twelve year olds
Taught live and in English, with a regular mentor, in a group of the same age or one to one.
I
Building
Ages 8 to 14
CAJ / BUILD / 01
C++ for kids
A gentle first step into the language contests use.
A weather forecasting site with live conditions for any location.
by Krish
Fees
Fees for a twelve year old in Peru
You pay a monthly fee in US dollars by card. The card's bank changes it into soles at its own rate when the payment goes through, so what you see on the statement can vary slightly from month to month.
Google reviews from parents and students, quoted exactly.
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"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
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★★★★★
"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
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"One of the most wonderful education centres out there. Education is not limited to school syllabus but focuses on skill development."
Vansh Agarwal
Student
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Sonam Oswal
Parent of Dhairya
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"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
Parents in Peru ask
Coding at age 12: questions from families in Peru
Are the classes in Spanish?
No. Classes are live and online, and they are taught only in English. Mentors speak clearly, follow your child's speed and accent, and write the important words on the shared screen. At twelve, most students follow well, and those who find it hard at first usually settle within a few weeks.
Is twelve a good age to start coding?
Yes. Twelve year olds learn typed code quickly because they read fast and can plan. A complete beginner of twelve often catches up with children who started much younger.
Should my twelve year old learn Python or C++?
Python first for almost everyone: it lets them think about the problem instead of the punctuation. C++ makes sense later for contests such as the OPI, whose 2025 final allowed only C++.
Does 1° de secundaria in Peru teach programming?
Not as its own area. The national plan gives secundaria Matemática, Comunicación, Inglés, Educación para el Trabajo and other areas, with digital skills as a shared competency. Some schools add computing in their own hours.
Can my child enter the ONEM at twelve?
Yes, through the school. The ONEM 2026 bases place 1° and 2° de secundaria in Nivel 1. Schools run the first stage, so ask yours. We are not connected with the ONEM and we never use its problems; our practice problems are our own.
When could classes be in Peru time?
Any day, any time, flexible: choose a batch, or for a very personalised plan choose 1-on-1 at the hour that suits your family. India stays ten hours thirty minutes ahead, so 16:30 for your child is 03:00 the next day for the mentor.
Can a twelve year old use ChatGPT in your classes?
No. ChatGPT and Gemini set 13 as their minimum age and Claude sets 18. Twelve year olds learn to solve problems without them; students meet AI tools in our teen courses where the maker allows.
What comes after twelve?
At thirteen, students can move into our teen courses: full Python, Java, web development, AI and contest programming. The mentor suggests the next step from what your child has built.
Do you prepare students for COAR admission?
No. We mention COAR only because its admission is for public-school students who have finished 2° de secundaria, which is close to this age. Our classes are coding and maths, and we promise no admission or contest result.
Is Modern Age Coders part of MINEDU or connected to schools in Peru?
No. Modern Age Coders runs independently, teaches from India, and has no tie with MINEDU, UTEC, a UGEL or any Peruvian school. Nothing we issue is a Peruvian grade; students who finish a course receive a completion certificate that we issue ourselves.
During the trial lesson your child solves a short puzzle, writes a small program and explains it, while the mentor listens for how they reason. Then you hear which course fits, whether a group or one-to-one lessons suit better, and which hours are open.
Would you like to read more first? How we teach describes a real class, and each syllabus is on the courses page.
Live lessons from India, in English only. For a quick answer, WhatsApp us in English.
Want a class sooner? Book a priority demo
A priority demo is a full class of about 45 to 60 minutes. After the class the mentor sends a written skill report and a personal learning roadmap on WhatsApp. If you enrol, the demo fee is adjusted against your first month's fee. Share your demo Order ID with us on WhatsApp and we take it off.
