Coding Classes in Voorschoten | Modern Age Coders

Course picks for Voorschoten

Four courses for the village between Leiden and The Hague

A child in the Bloemenwijk improving last month's game instead of starting again, a teenager in Starrenburg untangling an app that grew too fast, a student in Boschgeest deciding whether to rewrite a messy project, and an adult in Noord-Hofland whose team has been offered an AI-generated replacement for an old system. Each of them can begin with a free lesson.

Ages 6 to 10

Scratch Coding for Kids

Projects a child returns to and improves week by week, learning that good programs grow rather than restart.

See the syllabus

Ages 13 to 18

App Development for Teens

Apps that are cleaned up in small, tested steps as they grow, so they never have to be thrown away.

See the syllabus

College and adult

Python Automation Course

Refactoring in Python with tests as a safety net, and a plan for the rare rewrite that is truly needed.

See the syllabus

Adults

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

Deciding whether to repair or replace a spreadsheet, report or tool, with an eye on what the old one quietly handles.

See the syllabus

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 codingAges 13 to 17

Vibe Coding for Teens

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

See the syllabus

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 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

Agentic codingProfessionals

Codex & Claude Code

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

See the syllabus

Voorschoten today

Four thousand years of settlement, a castle, a corridor of green

Voorschoten is a single woonplaats and a single wijk, divided by the statistics office into 12 buurten: Noord-Hofland, Adegeest, Krimwijk, Dobbewijk, Nassauwijk, Vlietwijk, Centrum, Bloemenwijk, Bijdorp, Boschgeest, Starrenburg and the Buitengebied. Its 1,111 hectares of land and 45 of water hold a published 2,331 residents per square kilometre.

Kept, and rebuilt, in the encyclopaedia's account
Place	What the entry says	Kept or rebuilt
Boschgeest	soil finds show a settlement here as early as 2000 years before Christ	a very old place, lived in again
Kasteel Duivenvoorde	on the south side of Voorschoten, in private ownership since 1226	kept and adapted
The Dorpskerk	completed in 1868 in the English neo-Gothic style, the fourth church on this site	rebuilt, three times over
The Duivenvoordecorridor	on the south and west, part of the national ecological network, giving the municipality its green character	kept as open land

The Vliet, the Rijn-Schiekanaal, forms a boundary of the municipality. Between Leiden to the north-east and The Hague to the south-west, Voorschoten keeps a village scale, with a population that has grown gently from 22,683 in 1995 to 25,975 today.

Repair or rebuild

Two ways to deal with old code

Neither column is always right. The table sets out what each approach keeps, what it risks and when it tends to be the better choice.

Refactoring and rewriting compared
Question	Improve step by step	Rewrite from scratch	In the village
Does it keep working meanwhile?	yes, every step leaves a working program	no, the old one runs until the new one is ready, often for a long time	the castle stayed lived in while it was altered
What happens to old fixes?	kept, because the code that holds them stays	at risk, because nobody remembers why many lines exist	each old church took its history with it
How risky is each change?	small, and easy to undo	large, all arriving at once	one wing at a time, against a whole new building
When is it the better choice?	almost always, while the structure can still carry the load	when the foundation itself cannot do what is now needed	the fourth church was built when the third would no longer serve
What makes it safe?	tests written before each step	tests that capture what the old program really does, written first	knowing exactly what the old building did before pulling it down

The last row matters most. Before either approach, careful programmers write tests that pin down what the existing program actually does, including its odd behaviours, because some of those oddities are fixes for real problems and some are bugs, and nobody can tell which without looking. With those tests in place, small improvements can be made confidently, and a rewrite, if it is truly needed, can be checked against the old behaviour case by case instead of trusted on sight. The castle and the church are both honest answers to the same question. The mistake is to tear down a building that only needed repair, or to keep patching one whose foundations have gone.

Verified local facts

Voorschoten in the national statistics

Figures published for the municipality with their years, the encyclopaedia history, and a note of every calculation the page makes.

People

22,683 residents in 1995, 24,658 in 2013, 25,900 in 2025 and 25,975 on 1 January 2026. In 2025 there were 12,617 men and 13,283 women.

Ages in 2026

4,048 residents were under fifteen, 2,996 between fifteen and twenty-five, 5,348 between twenty-five and forty-five, 7,038 between forty-five and sixty-five, and 6,545 sixty-five or over.

Households

In 2025 there were 11,518 households, averaging 2.2 people: 7,413 of more than one person, and 4,021 with children at home.

Homes and incomes

11,650 dwellings in 2025, 7,572 owner-occupied and 4,078 rented, at an estimated average value of 528,000 euro. Average income was 42,100 euro per resident and 51,600 per income recipient in 2024, and 2.1 percent of residents were in poverty.

Schools and origin

The statistics list 8 primary establishments with 2,165 pupils in the municipality, and no secondary establishment. In 2025, 19,039 residents were of Dutch origin, 2,476 of European and 4,385 of non-European origin; 21,950 were born in the Netherlands and 3,950 abroad.

Calculations

25,975 minus 22,683 is 3,292. The age groups add to 25,975, and the origin groups, the birthplaces and the men and women each add to 25,900. The two tenure groups make 11,650.

Modern Age Coders has no link with the municipality of Voorschoten, Kasteel Duivenvoorde, the Dorpskerk or any school in the area, and the page implies none. The statistics are those published for Voorschoten for the years stated. The early settlement, the castle, the church, the corridor, the Vliet and the wijken come from the encyclopaedia entry for Voorschoten, which gives 25,978 residents on 1 January 2026 and an area of 11.59 square kilometres, from a different source, not combined with the statistics.

Signature project

Pin down what the old code does before you touch it

The safest way to improve a program, or to replace one, starts with the same step: record exactly what it does now.

1. Capture current behaviour

Feed the existing program a wide range of inputs, including strange ones, and record every output as a test. These tests describe the program as it is, oddities included.

2. Improve in small steps

Rename, split and tidy one piece at a time, running the tests after every change. If a test fails, the step changed behaviour, and you decide whether that was a bug fix or a mistake.

3. Replace piece by piece

If a part must be rebuilt, build the new version beside the old one and move traffic over gradually, comparing results, rather than switching everything at once on a single day.

What a rewrite can quietly lose
Hidden in the old code	Why it was there	What the rewrite may do	What catches it
A strange special case for one customer	a real problem fixed years ago	drop it as clutter	a behaviour test recorded before the rewrite
A rounding rule in a calculation	a legal or accounting requirement	use the obvious rule instead	comparing old and new outputs on real data
A check for an empty field	a crash that once happened	leave it out as unnecessary	tests with empty and missing inputs
A slow but careful step	a data problem it guards against	replace it with a fast, careless one	running old and new side by side
A church's place in the village	centuries of use	begin again on the same site	knowing what the old building did

Why AI makes rewriting tempting, and risky

AI assistants can produce a clean, modern version of an old module in seconds, and the result usually looks better than what it replaces. That is exactly the danger. The assistant sees the old code and writes something that does what the code appears to do, and appearances omit the special cases, workarounds and hard-won fixes that make old software reliable. A rewrite that took a team months used to be a serious decision; a rewrite that takes a minute is easy to accept without the checks it needs. The protection is the same as ever and now more important: before replacing anything, write tests that capture what the old program really does, run the new version against them, and move over in small steps with the old version still available. AI can then be a genuinely useful tool for refactoring, suggesting small improvements that the tests confirm. Voorschoten offers the two outcomes side by side, a castle kept since 1226 and a church in its fourth version, and the lesson of both is to know what you have before you decide what to do with it.

Reliable pipeline

Five habits for changing code that already works

For old programs, inherited spreadsheets, AI-suggested rewrites and anything that already does a job. Practised between a kept castle and a rebuilt church.

Improving without losing what works
Habit	In practice	What it avoids	What it gives
Tests first	Record current behaviour as tests before any change	Silent loss of old fixes	A safety net for every step
Small steps	Make one change at a time and run the tests	Big changes that are hard to undo	Progress you can trust
Ask why before deleting	Find out why a strange line exists before removing it	Removing a fix mistaken for clutter	Knowledge kept
Side by side	Run old and new versions together and compare outputs	Surprises on switch-over day	Evidence the new version matches
Review AI rewrites	Treat a generated rewrite like any other big change	Clean-looking code that lost behaviour	Help from AI without new risk

For younger learners

Last month's Scratch game, improved rather than restarted. The child fixes one thing at a time and plays the game after each change to check nothing else broke.

For teenagers

A messy Python program given to them with its quirks. The teenager writes tests of what it does, tidies it step by step, and explains which quirk turned out to be a hidden fix.

For adults

An old spreadsheet or tool at work compared with an AI-generated replacement on real data. Adults usually find at least one case the old one handled and the new one does not.

This section uses the encyclopaedia's account of Kasteel Duivenvoorde and the Dorpskerk as images, together with standard practice in software maintenance. It says nothing about how either building was altered or why earlier churches were replaced.

Learning ladder

From improving last month's game to judging an AI rewrite

The free lesson is where each learner's level is set, by watching how they handle a real task. Age alone does not set it, and neither does which buurt they live in.

Ages 6 to 10

Improve, do not restart

Children fix one thing at a time in a game they already built.

Scratch Coding for Kids Game Development for Kids

Ages 11 to 13

Tests as a net

Learners write tests before changing a small Python program.

Python and AI for Kids Maths Through Coding

Ages 14 to 18

Tidy a tangle

Teenagers refactor a messy program step by step and find its hidden fixes.

App Development for Teens Data Science for Teens

Ages 18 to 67

Repair or replace

Adults judge whether to rebuild a tool, and test any rewrite first.

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

Coding and AI

An AI can rewrite an old program in a minute. Why should a teenager in Voorschoten ask what the old one was doing?

Because a village with a castle kept since 1226 and a church in its fourth version shows that keeping and rebuilding are both choices, with different costs.

AI assistants have made rewriting code almost effortless. Paste in an old module and ask for a cleaner version, and a tidy replacement appears. What the assistant cannot see is the history: the special case added after a customer complaint, the rounding rule required by an auditor, the check added after a crash years ago. Those look like clutter, and a rewrite based on appearances tends to remove them. The new code passes a quick look and fails on the day one of those old situations comes back.

A learner who has written tests for a messy program before tidying it, and watched one strange line turn out to be the only thing preventing a crash, will never again accept a rewrite without asking what the old code did. Deciding whether to repair or replace, capturing current behaviour first and moving over in small steps are judgements a person makes. The assistant can produce the new code. Knowing what must survive the change is a human task.

So the case for a child in Voorschoten learning to code in 2026 is not the castle or the church. It is that someone who knows when to repair and when to rebuild, and how to make either safe, will be needed wherever AI makes it effortless to replace code that took years to get right. The longer argument is in why a child should still learn to code in 2026.

Delivery

A class for every buurt of Voorschoten

From the Vlietwijk by the canal to Boschgeest and the green south, the village is compact, and a lesson that starts at home is equally close to all of it.

A short walk to nowhere

A learner in Adegeest and a learner in Dobbewijk begin the lesson together, each at home. Nobody bikes to Leiden or The Hague for it, and nobody waits to be collected.

Dutch school labels kept

Groep, brugklas, vmbo, havo, vwo and the profielkeuze are used as Voorschoten families know them, while the teaching is in English.

The first hour costs nothing

It is a full lesson on a real task. The teacher then recommends a level, a course and a weekly time, and no payment details are asked for.

Classmates at your stage

Five to ten learners at the same point in the same subject. Voorschoten has 4,048 residents under fifteen, too few to fill every stage and hour locally, so groups include learners from other places.

Regio Midden weeks off

Twice a week, around eight lessons a month, at one set hour, pausing for the regio Midden holidays that Zuid-Holland schools keep.

Time in India, evenings here

The teachers are three and a half hours ahead of Voorschoten in summer and four and a half in winter, so late afternoons, evenings and weekend mornings are all open.

Eight primary schools, a village scale, and one group online

Voorschoten has 8 primary establishments teaching 2,165 pupils. A coding group needs five learners who match on subject, stage and hour, and in a village of this size they are found far more easily across every age from 6 to 67 and many countries than close to home.

Fees

What Voorschoten families pay

The whole price, in three lines.

First classUSD 0

A genuine lesson on a genuine task, finishing with a level and a course.

Group tuitionUSD 100

Per month, normally eight lessons, five to ten learners at one level.

Private tuitionUSD 150

Per month, normally eight lessons, one teacher for one learner.

The dollar fee is the same in every country and there is no euro list, so a household in Krimwijk pays what a household in Starrenburg pays. Nothing is charged until the free lesson has fixed a course and a time, and payment is then arranged on WhatsApp. The pricing page explains pauses, changes of format and missed lessons.

Request placement Check availability

Reviews

Six Google reviews, shown as written

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

How far has the learner got?

The first task might be improving a game one change at a time, writing tests before tidying a small program, or checking an AI rewrite against what the old code really did.

FAQ

Voorschoten coding class questions

The village, its castle and church, its figures, and the lessons.

Which buurten does Voorschoten have?

The statistics office divides the single wijk of Voorschoten into 12 buurten: Noord-Hofland, Adegeest, Krimwijk, Dobbewijk, Nassauwijk, Vlietwijk, Centrum, Bloemenwijk, Bijdorp, Boschgeest, Starrenburg and the Buitengebied.

How many people live in Voorschoten?

The national count was 25,975 on 1 January 2026, in 11,518 households in 2025. In 1995 it was 22,683.

How old is Voorschoten?

Soil finds show a settlement at the site of the present Boschgeest as early as 2000 years before Christ, according to the encyclopaedia.

What is Kasteel Duivenvoorde?

A castle on the south side of Voorschoten that has been privately owned since 1226. The green Duivenvoordecorridor on the south and west of the municipality is part of the national ecological network.

How old is the Dorpskerk?

The present church was completed in 1868 in the English neo-Gothic style and is the fourth church on its site, the encyclopaedia records.

How many schools are there in Voorschoten?

The statistics count 8 primary establishments teaching 2,165 pupils in the municipality and list no secondary establishment. This page rates no school.

Are the lessons in English, and when are they?

Lessons are in English, with Dutch school words such as brugklas, havo and vwo left untranslated. The teachers work from India, three and a half hours ahead of Voorschoten in summer and four and a half in winter, so late-afternoon, evening and weekend slots are easy to arrange. The slot is agreed in the free lesson, and regio Midden holidays are kept.

Is there a Modern Age Coders classroom in Voorschoten?

No, and none is claimed here or anywhere in the Netherlands. All teaching is live and online and needs a laptop or desktop, working audio, a current browser and a connection that holds. The telephone number shown on this page is an Indian one and is described as such.

What do Voorschoten coding classes cost?

The first lesson is free. After it, group tuition is USD 100 a month for two live lessons a week, normally eight across the month, in a group of five to ten learners. One-to-one tuition is USD 150 a month at the same frequency with a single teacher. Course, format, recurring hour and availability are all confirmed before anything is paid.

How many learners are in a group?

Five to ten, matched on level, pace and goal rather than on age, school or address. One-to-one means a single learner with a single teacher. When no group at the right level is running, a family can take one-to-one lessons or wait for the next group to form.

Explore the Leiden region and beyond

Up the Vliet to Leiden, down it to The Hague, and back to the hub

North-east along the Vliet, coding classes in Leiden covers the university city, and to the south-west lies The Hague, with Leidschendam-Voorburg in between. The whole province is gathered on Zuid-Holland. For machine learning from the start there is the AI and Python Academy, and every page in the series is listed on the Netherlands coding hub.

Book the free class Reach us on WhatsApp

Four courses for the village between Leiden and The Hague

Scratch Coding for Kids

App Development for Teens

Python Automation Course

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

Python, AI, vibe coding and agentic coding

Vibe Coding for Teens

Python Automation Course

AI and Machine Learning for Teens

Codex & Claude Code

Four thousand years of settlement, a castle, a corridor of green

Two ways to deal with old code

Voorschoten in the national statistics

People

Ages in 2026

Households

Homes and incomes

Schools and origin

Calculations

Pin down what the old code does before you touch it

1. Capture current behaviour

2. Improve in small steps

3. Replace piece by piece

Why AI makes rewriting tempting, and risky

Five habits for changing code that already works

For younger learners

For teenagers

For adults

From improving last month's game to judging an AI rewrite

Improve, do not restart

Tests as a net

Tidy a tangle

Repair or replace

An AI can rewrite an old program in a minute. Why should a teenager in Voorschoten ask what the old one was doing?

A class for every buurt of Voorschoten

A short walk to nowhere

Dutch school labels kept

The first hour costs nothing

Classmates at your stage

Regio Midden weeks off

Time in India, evenings here

What Voorschoten families pay

Six Google reviews, shown as written

How far has the learner got?

Voorschoten coding class questions

Which buurten does Voorschoten have?

How many people live in Voorschoten?

How old is Voorschoten?

What is Kasteel Duivenvoorde?

How old is the Dorpskerk?

How many schools are there in Voorschoten?

Are the lessons in English, and when are they?

Is there a Modern Age Coders classroom in Voorschoten?

What do Voorschoten coding classes cost?

How many learners are in a group?

Up the Vliet to Leiden, down it to The Hague, and back to the hub

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