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London Borough of Haringey

Coding classes in Haringey

What are the best coding classes in Haringey?

Haringey is the north London borough of Tottenham, Wood Green, Hornsey, Muswell Hill, Crouch End, Highgate and Stroud Green, with 264,238 residents at the 2021 Census and Alexandra Palace on its hill, where Historic England records the world's first high-definition television programme was transmitted in 1936. A worthwhile coding class teaches a learner how the security behind every website actually works, and this page does that with cryptography: two people agree a secret number while everyone listens, then learners time how long an eavesdropper would need to work it out. Teachers based in India teach live on video, for learners aged 6 to 67, one to one or in classes of five to ten at the same level. The opening lesson is free; afterwards it is USD 100 a month for a class place or USD 150 a month for private teaching.

Historic England lists Alexandra Palace partly for the BBC studios where, in 1936, the world's first high-definition television programme was transmitted, from a lattice mast that put the aerial 460 feet above sea level. Broadcasting is public by design: anyone with a set could watch. Our learners take on a puzzle that sounds impossible in that setting. Can two people agree a secret number when everything they say is broadcast to the world? The Diffie-Hellman key exchange says yes, using a little modular arithmetic that a Year 9 pupil can follow. Then learners switch sides, become the eavesdropper, and time their own attacks. Each extra bit of key doubles the brute-force work; a cleverer attack called baby-step giant-step square-roots it.

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Facts last verified 25 September 2026. Teaching is online; no Haringey branch is claimed.

Course picks for Haringey

Where Haringey learners start

Picture a Year 3 child in Muswell Hill who writes secret notes in code, a Year 9 pupil in Tottenham who wonders how the padlock in the browser works, a Year 13 student in Crouch End thinking about cyber security at university, and a small business owner in Wood Green who wants to understand what keeps customer data safe. Each can start with a free lesson.

Scratch Coding for Kids course thumbnail
Ages 6 to 10

Scratch Coding for Kids

A Scratch secret-message game with a key that shifts letters, and a first idea of why keys matter.

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 Python and AI for Kids course thumbnail
Ages 9 to 12

Python and AI for Kids

First Python with remainders: clock arithmetic, powers that wrap around, and a tiny shared secret.

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 Python for Teens course thumbnail
Ages 13 to 18

Python for Teens

Python for Key Stages 3 to 5, including Diffie-Hellman, brute force and baby-step giant-step on this page.

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 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 handle sensitive data and want a clear picture of how encryption keys are agreed and attacked.

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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.

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 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.

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 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.

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Haringey in numbers

264,238 residents and six Grade I entries

Each figure comes from the organisation named, or from our count of what it publishes.

Haringey facts and their sources
FactFigureWhere it is published
Residents on Census day 2021264,238ONS table TS001
Heritage List entries in the borough286, with 6 at Grade I and 21 at Grade II*Historic England data, counted 25 September 2026
Year of the first high-definition television programme at Alexandra Palace1936Historic England list entry 1268256
Line at Wood GreenPiccadillyTfL open data, checked 25 September 2026

Highpoint

The two Highpoint blocks in Highgate are both listed at Grade I, a rare distinction for twentieth-century flats.

Castle and house

Bruce Castle and the tower to its south west are Grade I, as are Cromwell House and its forecourt walls.

Halls and houses

Hornsey Town Hall, Dial House, Percy House and Byron House are among the borough's Grade II* entries.

Haringey Council lists libraries at Alexandra Park, Coombes Croft, Highgate, Hornsey, Marcus Garvey, Muswell Hill, Stroud Green and Harringay, and Wood Green, as well as a community and youth music library.

The idea

Agreeing a secret while everyone listens

Diffie-Hellman uses clock arithmetic: numbers that wrap round when they reach a chosen prime, just as hours wrap round at twelve.

A toy exchange small enough to check by hand
StepAliceBobHeard by everyone?
Agree a prime and a baseprime 23, base 5prime 23, base 5Yes
Pick a private number615No
Send base to that power, wrapped at 23819Yes
Raise what you received to your private number19 to the 6th, wrapped: 28 to the 15th, wrapped: 2No: both now hold 2

Both end up with the same secret, 2, yet the only numbers that crossed the open channel were 23, 5, 8 and 19. An eavesdropper who wants the secret must work backwards from 8 to Alice's private 6: find the power that turns 5 into 8, wrapping at 23. That backwards problem is called the discrete logarithm, and nobody knows a fast general way to solve it for large numbers. With a prime of 23 it takes seconds by hand; the project is about what happens as the prime grows.

Signature project

Become the eavesdropper: two attacks, timed

Learners generate their own primes of increasing size, make keys, and try to recover the private number, first by brute force, then by baby-step giant-step.

1. Brute force

Try every power in turn until one matches. On average it takes about half as many steps as the size of the prime.

2. Baby-step giant-step

Store a table of small steps, then take big jumps and look each one up. The work grows only with the square root of the prime, at the price of memory.

3. Time it

Run each attack several times at each key size, record steps and seconds, and plot them on a log scale.

Average steps to crack a toy key, run on our computer on 25 September 2026
Prime sizeBrute forceBaby-step giant-stepBaby-step giant-step time
12 bits1,14176under a millisecond
20 bits392,8341,284under a millisecond
24 bits5,026,774 (0.57 s)4,928about 1 millisecond
32 bitsnot run81,462about 0.04 s
40 bitsnot run1,342,886about 0.7 s
48 bitsnot run18,438,231about 13 s

Every four extra bits multiply the brute-force work by about sixteen; the same four bits multiply baby-step giant-step by only about four. At 48 bits the clever attack finishes in about 13 seconds on an ordinary computer, while brute force would need months at the speed we measured, an extrapolation we did not run. That is the heart of modern security: keys are chosen so large that even the fastest known attacks would take far longer than anyone could wait. Toy keys like these are for learning only; real systems use far larger numbers and carefully chosen settings.

Why this cannot be skipped with AI

An AI assistant can describe Diffie-Hellman in a paragraph and even write the code. It cannot give a learner the moment of watching their own brute-force attack slow to a crawl as the prime grows, or of beating it with a smarter algorithm and then running out of memory. That experience, how work and memory scale with input size, is the foundation of cryptography and of computer science generally.

Responsible learning

Attacking only your own keys

Security is learned by thinking like an attacker, safely and legally.

Own keys only

Learners attack keys they generated themselves, on their own computer. Nothing here touches anyone else's system.

Toy sizes

The largest key in this project is 48 bits, deliberately tiny, so the scaling is visible without any real-world risk.

Why it matters

Understanding the attack is how defenders choose settings well. The project ends with learners explaining why real keys are chosen so much larger.

GCSE computer science pupils can follow the toy exchange and the idea of brute force; A-level students can implement both attacks and analyse their growth using the language of algorithm complexity. The list entry is Historic England's; the primes, keys, attacks and timings are our own, run on 25 September 2026, and different computers will give different times. Historic England, the BBC, Haringey Council, TfL and the ONS have no connection with Modern Age Coders.

Getting around

Wood Green, the Piccadilly line and home

Haringey has Tube, Overground and main-line stations. Our lessons use none of them.

Wood Green

TfL's open data lists the Piccadilly line at Wood Green.

Highgate to Tottenham Hale

Learners at the western and eastern edges of the borough can share one class from home.

A shared secret

Every class is a small group of five to ten at one stage, where learners get to know the teacher and each other.

Haringey in London

Haringey is one of London's 32 boroughs. The London page lists all of them and the City, linking each as its page is published, including Enfield to the north and Hackney to the south east.

Learning ladder

From secret notes to discrete logarithms

The free lesson shows us a learner's real starting point, and we build from there rather than from their year group.

Ages 6 to 10

Codes and keys

Children make Scratch games that scramble and unscramble messages with a key.

Scratch Coding for KidsCoding for Kids
Ages 10 to 13

Clock arithmetic

Python that works with remainders and powers, the building blocks of modern encryption.

Python and AI for KidsMaths Through Coding
Ages 13 to 18

Keys and attacks

Diffie-Hellman, brute force and baby-step giant-step with measured scaling, ideal preparation for cyber security or A-level computer science.

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

Security literacy

Adults learn what encryption can and cannot protect, and why key size matters, without needing heavy maths.

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

AI can write encryption code. Why should a Haringey teenager understand it?

Because security fails in the details, and only understanding catches the details.

AI coding tools will produce working encryption code on request. Security problems usually come from somewhere else: settings chosen too small, randomness that is not random, a shortcut that seemed harmless. A learner who has cracked their own 24-bit keys in half a second, and watched a smarter attack do the same to 48-bit keys, understands in their bones why key sizes and careful choices matter. That understanding is exactly what is needed to check machine-written security code.

Cryptography also teaches a general skill: reasoning about how cost grows with size. It applies to databases, search engines and AI models themselves. Code can be generated; judging whether it is safe remains human work.

Alexandra Palace broadcast to everyone. A Haringey learner who knows how to share a secret in that kind of world has a skill every modern organisation needs. The longer argument is in why teenagers should still learn to code in 2026.

Delivery

Muswell Hill to Tottenham, lessons live

Anywhere in Haringey, a learner is in class the moment the video call connects.

From home

A laptop or desktop with headphones and a broadband connection that can handle video is all that is required.

Key Stages we use

We describe progress in English Key Stages, from the first years of primary school to sixth form, and name GCSE or A level where they apply. All lessons are in English.

A free start

The first lesson is real teaching, finishing with a suggested level and course; we do not ask for any card details.

Grouped by stage

Five to ten learners at one stage share each class, drawn from across the UK and abroad, so a convenient hour is usually on offer.

Twice a week

Classes usually run on two evenings a week, with breaks for holidays and exams agreed in advance.

UK time

Teachers work from India; every time in our messages is UK time.

A busy borough, a small class

About 264,000 people live in Haringey, and a good class still needs five learners at the same stage free together, so our groups reach well beyond it.

Fees

Fees for Haringey families

The first lesson is free; then one monthly fee applies in every part of the borough.

First classUSD 0

A complete 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.

Haringey families pay in US dollars, like every family outside India, and no sterling prices appear on the site. No payment is taken before the free lesson, or before a course and regular time are chosen. The pricing page explains pauses, missed lessons and switching between group and private lessons.

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Reviews

Google reviews from our families

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

Book a free lesson

Tell us the learner's age or school year and something they enjoy. Lesson one might be a Scratch secret-message game, some Python clock arithmetic, or the key exchange on this page.

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FAQ

Questions from Haringey

About the borough, the cryptography project and how lessons work.

How many people live in Haringey?

The 2021 Census counted 264,238 usual residents in the London Borough of Haringey, in ONS table TS001.

What happened at Alexandra Palace in 1936?

Historic England's list entry records that its BBC studios transmitted the world's first high-definition television programme in 1936, from a lattice mast that gave an aerial height of 460 feet above sea level.

What is the Diffie-Hellman key exchange?

A method for two people to agree a secret number over a public channel. Each keeps a private number, publishes a value computed from it, and combines the other person's published value with their own private number to reach the same secret.

How long did the attacks take?

On our computer, brute force needed about 5 million steps, roughly half a second, for a 24-bit prime. Baby-step giant-step needed about 4,900 steps for the same size and about 13 seconds for a 48-bit prime.

Is it legal to crack keys?

Learners only attack keys they generated themselves, on their own computer, at deliberately tiny sizes. Attacking other people's systems without permission is illegal, and the project never does it.

When would lessons happen?

After the free lesson we suggest a weekly time in a class at the right level with a place available. Teachers are in India; the time is quoted in UK time.

What does a learner need?

A computer with sound and a steady connection. The cryptography project needs only Python; no data downloads.

Is there a Modern Age Coders centre in Haringey?

No. There is no Haringey 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 Haringey 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

Elsewhere in London

Every borough and the City is on our London page, linked as its page goes live, including Barnet to the west and Camden to the south. Learners interested in security and computation can continue into our AI and machine learning classes in London, and the UK coding page compares school years in the four nations.

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