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Dordrecht, Zuid-Holland

Coding classes in Dordrecht, where one flood has three death tolls and they differ by a factor of eight thousand

What are the best coding classes in Dordrecht?

Coding classes in Dordrecht serve 122,991 people (Statistics Netherlands, 1 January 2026) on an island that is 22 percent water by area, in a municipality that calls itself the oldest city of Holland. The flood that made it an island in 1421 is remembered with a death toll of about two thousand, a legend that inflated it to a hundred thousand, and a modern reading of the evidence that puts the deaths in the Grote Waard at about a dozen. Six centuries of repetition produced none of that certainty. Wherever on the island a learner sits, Modern Age Coders reaches them live and in English, at any age from 6 up to 67. Nothing is charged for the first hour. Beyond it the fee is USD 100 a month for a group of five to ten, or USD 150 for one-to-one work.

How many people drowned here in November 1421? The traditional answer is two thousand, hedged in its own source with the words as they say. A later legend raised it to a hundred thousand. Modern analysis of the evidence puts the deaths in the Grote Waard at roughly a dozen. Nothing new was discovered to make the first number two thousand; it was written down, copied, and copied again, and each retelling made it more solid rather than better attested. Counting citations is not counting evidence, and a child who learns that early is protected for life.

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Facts last verified 8 September 2026. Teaching is online; no Dordrecht branch is claimed.

Course picks for Dordrecht

Four courses for a city that has been arguing about its own records since 1618

A groep 5 child in Sterrenburg, a teenager in Dubbeldam who would rather check a claim than repeat it, an adult in the old harbour retraining, and a parent in Stadspolders whose reports cite figures nobody can trace: four doors on one island.

Python and AI for Kids course thumbnail
Ages 8 to 12

Python and AI for Kids

Typed Python, turtle drawings and a first program that learns a rule, in English, for the groep 5 to 8 child anywhere on the island.

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

Python for Teens

Two years from a blank file to real projects, for the teenager whose school offers no timetabled route into programming.

See the syllabus
 Data Science for Teens course thumbnail
Ages 13 to 17

Data Science for Teens

Python and real datasets to a first trained model, for the teenager who wants to trace a number to where it came from.

See the syllabus
 Data Analysis Course course thumbnail
Adults

Data Analysis Course

Excel, SQL, Python and BI, for the working parent whose sources all agree because they all copied the same one.

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 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
Dordrecht today

A whole island in one municipality, a fifth of it water

The national register held 122,991 people on 1 January 2026, in 57,807 households averaging 2.08 people, on 77.56 square kilometres of land inside 99.47 of territory. That leaves 2,191 hectares of water, nearly 22 percent of the municipality, which is what a city built where three rivers meet looks like on a map. In 1995 the count was 114,089, so Dordrecht has gained 8,902 people in thirty-one years, a rise of 7.8 percent, among the slowest in this series.

A working city, not a student one

18,375 residents are under fifteen and 13,765 are between fifteen and twenty-five; 33,357 are between twenty-five and forty-five, 32,218 between forty-five and sixty-five, and 25,276 are sixty-five or over. 23,817 households hold one person, 41 percent. Only 804 students are counted at institutions here, while 2,370 residents are in applied higher education and 1,070 at university level.

Thirty-six primary schools, eleven secondary

36 primary establishments teach 10,534 pupils and 11 secondary establishments teach 7,208. The whole municipality is one woonplaats divided into 14 wijken and 133 buurten, so nothing is far, but the island has one road and rail crossing to the north and the traffic behaves accordingly.

The oldest city of Holland

Its entry says so directly, and dates the confirmation of city rights by Count Willem the First to 1220, after earlier charters granted around 1195 and 1205. Note that the claim is about Holland rather than about the Netherlands, which is a different competition and one this cluster settles elsewhere.

An island by accident, and a synod

The municipality covers the entire Island of Dordrecht, the Eiland van Dordrecht, about 9,000 hectares. The island exists because of the St Elizabeth floods, the Sint-Elisabethsvloed of 1421 and a second in 1424, which put the city on water it had not been on before. In 1618 and 1619 the Synod of Dordrecht met here, setting the Remonstrants against the Counter-Remonstrants and commissioning the translation that became the Statenbijbel of 1637.

Where the learners are

One island, fourteen wijken, one bridge north

Dordrecht is a single woonplaats divided into 14 wijken and 133 buurten across the whole island. There are no villages with separate names, and the water is the boundary on every side.

The old centre and the harbours

The medieval core between the Voorstraat and the water, with the harbours the city grew on and the Grote Kerk above them. Small, dense and holding much of the 41 percent single-person households.

Krispijn and the west

The early twentieth-century districts beyond the station, working streets built when the shipyards and the river trade were the whole economy.

Dubbeldam

East of the centre, a village absorbed into the city and still spoken of by its own name, with its own schools and a distinct centre.

Sterrenburg

The southern expansion of the 1960s and 1970s, the largest of the post-war districts and where a good many of the 18,375 under-fifteens live.

Stadspolders

The eastern expansion of the 1980s, the newest large district, with the fullest primary schools on the island and the shortest walk to open water.

The rest of the island

The polders south and east of the built-up area, farmland and nature inside the same municipality. Twenty-two percent of the whole is water, and a good deal of the rest is not housing.

All fourteen wijken get the same class at the same hour and the same fee, and stage rather than address decides which group a learner joins.

Verified local facts

Every figure and its source, and the three death tolls quoted exactly

The national count, the municipal entry, the flood entry, the synod and the city rights.

The municipal count

Statistics Netherlands, 1 January 2026: 122,991 residents; 57,807 households averaging 2.08 people, 23,817 of them single-person, 41 percent; 18,375 under fifteen; 13,765 aged fifteen to twenty-five; 33,357 aged twenty-five to forty-five; 32,218 aged forty-five to sixty-five; 25,276 aged sixty-five and over; 36 primary establishments with 10,534 pupils and 11 secondary with 7,208; 804 students at institutions here; 2,370 residents in applied higher education and 1,070 at university level; total area 9,947 hectares, land 7,756; density 1,583; one woonplaats, 14 wijken and 133 buurten; 114,089 residents in 1995, a rise of 8,902.

The municipality, described

Its own entry: 122,933 residents on 1 January 2026, 58 fewer than the national figure for the same date, both kept; 99.47 square kilometres, 78.54 of land and 20.93 of water, against 77.56 of land nationally, both kept; mayor Nanning Mol; the fifth municipality of the province of Zuid-Holland; the municipality covers the entire Island of Dordrecht, about 9,000 hectares.

The city rights

The same entry: Dordrecht is the oldest city of Holland, and Count Willem the First confirmed its city rights in 1220, after earlier charters had already been granted around 1195 and 1205. Three dates, one of them a confirmation rather than a grant, and the page quotes all three.

The flood, in the city entry

It records that in 1421 and 1424 the St Elizabeth floods left Dordrecht on an island, and gives no casualty figure at all.

The flood, in its own entry

Dated to the night of 18 to 19 November 1421. It states that an estimated thirty or so villages were made uninhabitable, that two thousand people are, as it puts it, said to have drowned, that the figure was inflated in legend to a hundred thousand, and that modern analysis puts the deaths in the Grote Waard at about a dozen. All four of those statements are in the same entry.

The synod

The Synod of Dordrecht met in 1618 and 1619, setting Remonstrants against Counter-Remonstrants, and produced the translation published as the Statenbijbel in 1637.

Modern Age Coders has no connection to the municipality or any school named here and claims none. The three casualty figures are quoted exactly as the entry gives them, including its own hedges, and this page does not choose between them.

Signature project

Two thousand, a hundred thousand, or a dozen: build the habit of tracing a number to its source

One night in 1421, three figures separated by nearly four orders of magnitude, and a lesson about what repetition does and does not prove.

1. Line the three up

About a dozen deaths in the Grote Waard, from modern analysis. Two thousand, carried in the traditional account and hedged in its own source with the words as they say. A hundred thousand, from legend. The largest is about eight thousand times the smallest, and all three describe the same night.

2. Ask how each one is supported

The learner separates the question of what a figure says from the question of how it is known. One rests on reasoning about the settlements and the ground; one rests on a chain of retellings whose earliest link the source itself flags as hearsay; one rests on nothing at all except being memorable. The three are not three estimates, they are three different kinds of claim.

3. Count the sources, not the mentions

A figure repeated in a hundred books may descend from one manuscript, and search results measure how often a claim has been copied rather than how well it is attested. The learner writes the rule down: before believing a number, find the earliest thing that says it, and count how many independent things say it after that.

One night in November 1421, three published figures
FigureWhere it comes fromHow it is supportedWhat it can be used for
About a dozen deaths in the Grote Waardmodern analysis, per the same entryreasoning from evidence about the ground and the settlementsa working estimate, open to revision
Two thousand drownedthe traditional accountthe entry itself says people are said to have drowneda record of what has been believed
A hundred thousand drownedlater legend, per the same entrynothing offereda fact about the legend, not the flood
About thirty villages made uninhabitablethe same entry, given as an estimatestated as an estimatea bounded description, usable with the hedge kept

Repetition is not evidence, and a search result is a count of copies

Numbers travel better than the reasons for them. A figure written once in a chronicle gets copied into a history, then into a schoolbook, then into a thousand pages, and at every step the hedge that came with it falls away a little more, until it is quoted flatly by people who have never seen the original and reasonably assume somebody else has. The defences are unglamorous. Find the earliest source that states the figure. Ask whether later sources are independent of it or descended from it. Keep the hedge that the original carried, because as they say is part of the claim rather than decoration. And treat a very round, very large number about a very old event as a hypothesis about human memory rather than a measurement. Every figure in the table above is quoted from the entries named in the evidence for this page, including the hedges, and none is preferred here.

Reliable pipeline

Five habits for a figure everybody already knows

Nine out of ten dentists, most of the brain unused, a statistic in a slide deck with no footnote: the most confidently repeated numbers are often the least attested. Practised on a night this city has remembered for six hundred years.

When a number arrives already famous
StageRuleWhat it preventsWhat it gives you
Find the earliest statementFollow the citations back until they stopA chain mistaken for a consensusThe actual origin of the claim
Test independenceAsk whether each source could have got it from the lastA hundred copies counted as a hundred witnessesThe real number of sources, often one
Keep the hedgeCarry as they say, about and estimated through every retellingAn estimate hardening into a factA claim as strong as its evidence
Distrust round and largeTreat a memorable number about a distant event with extra suspicionA hundred thousand accepted for a lack of alternativesProportion
Say what kind of claim it isSeparate a measurement, a reasoned estimate and a traditionThree different things averaged togetherA record a reader can weigh

For younger learners

A message whispered along a line of children, with the first and last written down and compared. Then the interesting version: the teacher asks each child how sure they are, and everyone is confident, because everyone heard it from someone who seemed sure.

For teenagers

A small tool that takes a claim and records, for each source found, whether it cites another source in the list. The count of independent roots is usually one. The stretch: apply it to a statistic in current circulation and try to reach the earliest publication.

For adults

The same trace on a figure that circulates inside your own organisation: a market size, a conversion benchmark, a cost per acquisition. Adults very often find the trail ends at a slide with no source, made by somebody who has left.

The population, household, area, school and synod figures come from the offices and entries named beside them. The three casualty figures and the village estimate are quoted from a single entry that carries all of them, with its own hedges preserved, and no arithmetic is performed on any of them.

Learning ladder

From a whispered message to a citation trace that ends at one page

The starting rung is settled in the free hour, and the wijk on the address plays no part.

Ages 6 to 10

Where did you hear that?

Children pass a message along and discover confidence survives better than accuracy.

Coding for KidsPython and AI for Kids
Ages 11 to 13

Sources and copies

Learners sort a pile of claims into originals and repetitions.

Maths Through CodingProblem Solving and Computational Thinking for Kids
Ages 14 to 18

Independence, hedges and roots

Teenagers build the trace tool and count how many independent roots a famous figure really has.

Python for TeensData Science for Teens
Ages 18 to 67

Benchmarks at work

Adults trace a number their team relies on back to whatever it actually came from.

Data Analysis CoursePython Masterclass
Coding and AI

An AI will tell you two thousand people drowned in 1421. Why should a child in Dordrecht learn to ask who counted?

Because that figure is everywhere, and being everywhere is exactly what a model measures.

A system trained on text learns which claims appear most often, and the most often repeated version of this one is two thousand. That is not a flaw in the training so much as an accurate reflection of the corpus: the number really is repeated more than any other. What the corpus does not encode is that the repetitions descend from a small number of tellings, that the source carrying the figure hedges it, or that a modern reading of the same evidence lands three orders of magnitude lower.

So the learner builds the trace instead of accepting the total. The work is unglamorous, mostly reading and record-keeping, and it produces the single most useful question anybody can carry into professional life: how many independent sources are there, really. A fourteen-year-old in Dubbeldam who has followed one number back to a single manuscript will follow a market-size figure back to a slide at twenty-four. Tools will keep reporting the consensus. Noticing that a consensus can be one source copied a thousand times is the part a person does.

The case for a Dordrecht child learning to code in 2026 is therefore nothing to do with medieval floods. It is that the most confidently held numbers are often the least examined, that tracing one to its origin is a skill rather than a talent, and that this city keeps an unusually clear example of it in its own history. The longer argument is in the argument for a child writing code in an age of AI.

Delivery

Live classes for a city with water on every side

The island has one main crossing north and the traffic knows it. Nothing on this page requires anybody to use it.

No bridge, no tunnel, no queue

The lesson happens at the kitchen table in Sterrenburg, Dubbeldam or the old harbour at one fixed hour a week.

A lesson in English that keeps the school's Dutch

The teaching happens in English. Four words are left exactly as a Dutch school prints them, groep and havo and vwo and profielkeuze, so a child never has to guess which term the teacher means.

One free hour, three decisions

By the end of it the teacher knows what the learner can do, the learner has a course with a name, and the week has a slot in it. Not one of those steps involves a card.

Stage sets the group

Two learners at the same point work together whichever wijk they live in, and two at different points do not.

Twice weekly, on the middle calendar

Two lessons a week at one repeating slot, eight in most months. Dordrecht takes its holidays with regio Midden along with the rest of Zuid-Holland, and weeks away are written in first.

Winter adds an hour to the distance

One country moves its clocks and the other never has, which leaves the teacher three and a half hours in front through the summer and four and a half through the winter. Anything after school and before bedtime lands inside both working days, as does either weekend day.

Almost nothing to study here after school

Only 804 students are counted at institutions in the municipality, while 3,440 residents are registered in higher education somewhere. Dordrecht sends its students to Rotterdam and beyond, and a class that arrives through the connection is one of very few things on this island that does not require the crossing.

Fees

The fee, in dollars, everywhere on the island

Printed here rather than saved for a phone call.

First classUSD 0

A complete lesson with a real task, a level and a named next course.

Group tuitionUSD 100

Per month, normally eight lessons, five to ten learners placed by ability.

Private tuitionUSD 150

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

A single international rate applies and it is a dollar figure, with no euro list, so every address on the island sees the same number. Nothing is collected before the free lesson has produced a course and a time, and payment then goes through WhatsApp. Pausing, changing plan and missing a week each have their own paragraph on the pricing page.

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Reviews

Six Google reviews, printed as their authors typed them

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

Tell us where the learner is; the address is not needed

The first task might be a message whispered down a line, a citation trace that ends at one page, or a benchmark at work whose trail stops at a slide by somebody who has left.

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FAQ

Dordrecht coding class questions

The city, its island, its records, the teaching and the terms.

How many people really died in the St Elizabeth flood?

Nobody knows, and the honest answer is to give all three published figures with their support. The entry on the flood dates it to the night of 18 to 19 November 1421, says about thirty villages were made uninhabitable, records that two thousand people are said to have drowned, notes that legend inflated the toll to a hundred thousand, and reports that modern analysis puts the deaths in the Grote Waard at about a dozen. Tracing a famous number back to what actually supports it is the project on this page.

Is Dordrecht the oldest city in the Netherlands?

It calls itself the oldest city of Holland, which is a narrower claim, and its entry dates the confirmation of its city rights by Count Willem the First to 1220 after earlier charters around 1195 and 1205. The separate argument about the oldest city of the Netherlands is set out on the Nijmegen page in this series.

Is the whole municipality really an island?

Yes. The municipality covers the entire Island of Dordrecht, about 9,000 hectares, and just under 22 percent of its 99.47 square kilometres is water. The island exists because of the St Elizabeth floods of 1421 and 1424.

Is any of this taught in Dutch?

It is not. All teaching happens in English. School vocabulary is the exception and stays Dutch, so a teacher says groep, havo, vwo or profielkeuze rather than reaching for a translation. There is no Dutch edition of this course.

What time are classes for a family in Dordrecht?

Summer here puts three and a half hours between the two sides and winter puts four and a half, all of the movement coming from the Dutch clock. What works in practice is the stretch after school and before bedtime, plus any hour of Saturday or Sunday. The recurring slot is fixed at the free lesson and then stays.

Why are there so few students in Dordrecht?

Because there is very little to study here. Only 804 students are counted at institutions in the municipality, while 2,370 residents are registered in applied higher education and 1,070 at university level. Almost everyone travels, which is one more argument for a class that does not require a journey.

What is in the free lesson?

It starts wherever the learner's ability currently stops, with a single task set just beyond that. Passing a message down a line and comparing the two ends suits a young child. A teenager builds a trace that counts independent sources rather than mentions of a claim. An adult brings in a benchmark from work. What remains at the end is a course, a rung, a weekly time and a price in dollars, none of it paid for.

Is there a Modern Age Coders classroom in Dordrecht?

No, and none is claimed in the old harbour, in Stadspolders or anywhere in the Netherlands. Lessons are live online and need a laptop or desktop, working audio, a current browser and a stable connection. The telephone number on this page is Indian and is described as such.

What do Dordrecht coding classes cost?

The first lesson is free. Group tuition is USD 100 a month for two live lessons a week, normally eight in the month, in a group of five to ten. Private tuition is USD 150 a month, one learner with one teacher at the same frequency. Course, format, recurring time and availability are confirmed before payment.

How many learners are in a Dordrecht group?

Between five and ten, matched on level, pace and goal rather than on age, school or wijk. Private tuition is one learner and one teacher. If no group at the right level is running, the family can take private tuition or wait for the next one to form.

Explore the Netherlands

North across the water, out to the province, and up to the country

North across the rivers is Rotterdam, and Dordrecht is the fifth municipality of Zuid-Holland, whose page is about a region nobody ever drew a boundary for. The argument about which town is the oldest in the country is on the Nijmegen page. Sitting at the head of it all is the Netherlands coding hub. Two more pages exist for anyone who turns out to want trained models instead of running programs: AI and machine learning classes in the Netherlands and the AI and Python Academy.

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