How many people live in the homes of central Reutlingen? A ten year old with a few lines of Python can answer, but only with two small words in front: "at least". Learning why is the kind of thinking our live coding classes in English build. This page shows what a first lesson looks like for a Reutlingen child, when schools in Baden-Württemberg start Informatik, two free contests open to primary pupils this school year, and the household project itself.
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What it is
Coding classes for kids in Reutlingen at Modern Age Coders are live online lessons in English for children from 6 to 12. Younger children start with puzzles and Scratch games, older ones type Python and work with small real data files, and every child stays with one mentor who adapts to their speed and the way they speak. Children learn in age groups of fifteen to twenty, or alone with the mentor, after school or on weekend mornings.
Where to begin
What are good first coding courses for a Reutlingen child?
Three starting points for different ages and temperaments.
What happens in a first coding lesson for a Reutlingen child?
It is short, friendly and hands-on. Here is how a free first class usually goes for a child of 6 to 9.
Hello on video. The mentor says hello, asks the child's name and what games they like, and speaks slowly and simply. A parent sits nearby for the first few minutes.
A puzzle without a computer. The child gives the mentor step-by-step instructions to draw a house, and laughs when the mentor follows them a little too exactly.
The same idea in Scratch. The child drags blocks to make a cat walk and speak. The mentor watches and asks questions but lets the child do the clicking.
A small surprise. One block in the wrong place makes the cat do something silly, and the child finds and fixes it. That is the first piece of debugging.
A goodbye and a note. The mentor tells the parent what the child managed and suggests a group, or one-to-one lessons if that suits better.
If English is not yet strong
Every lesson is taught in English, by a mentor based in India. That is fine for most children, because coding lessons are full of things you can see: blocks, characters, colours and movement.
Mentors use short sentences, repeat and show. When a child answers in German, the mentor understands the meaning and offers the English words, without fuss.
Older children, 10 to 12
For older children the first class can start straight in Python. They type a few lines, see the result, and change it. Within one lesson many write a small program that asks a question and answers it.
From there, real data comes quickly, like the household file below, which most ten year olds find more interesting than invented numbers.
A Reutlingen data project
How many people live in the homes of central Reutlingen?
At least 4,852, and the "at least" is the clever part. Stadt Reutlingen publishes its household statistics for every part of the city, free to reuse under the Datenlizenz Deutschland Namensnennung 2.0, and our older children use them to learn what to say when the data does not tell you everything.
The file
The city's statistics office lists, for each of 30 parts of Reutlingen and each year from 2012 to 2025, how many homes there are, how many have one person, two people, three people, and "4 und mehr Personen", four or more. Our copy is from 3 November 2026.
Children get just the 2025 rows, saved as haushalte_2025.csv, with six columns: the area, the number of homes and the four size groups.
The question
In the Zentrum area there are 2,939 homes: 1,810 with one person, 614 with two, 246 with three and 269 with four or more. How many people is that?
Children usually multiply each group by its size and add. That works perfectly for the first three groups. But how many people are in a "four or more" home? Four? Five? Seven? The file does not say.
Count the people we can be sure ofPython
import csv
with open("haushalte_2025.csv", encoding="utf-8") as f:
areas = list(csv.DictReader(f))
zentrum = areas[0]
print("Area:", zentrum["area"])
at_least = (1 * int(zentrum["one"]) + 2 * int(zentrum["two"])
+ 3 * int(zentrum["three"]) + 4 * int(zentrum["four_or_more"]))
print("People living in these homes: at least", at_least)
It prints: Area: 010 Zentrum and People living in these homes: at least 4852.
The program counts every "four or more" home as exactly four, the smallest it could be. So 4,852 is a floor, not the answer: the true number can only be the same or bigger. If every one of those 269 homes had five people, there would be 269 more. Saying "at least 4,852" is completely honest. Saying "4,852" would not be.
Ten year olds often ask whether we could find the real number somewhere. Sometimes, from another table. But the lesson stands on its own: when a group has no top, you can give a lower bound and explain it, and that is real mathematics, not a failure.
Which part of Reutlingen has the most one-person homes?Python
for area in areas:
share = 100 * int(area["one"]) / int(area["households"])
area["share"] = round(share, 1)
most = max(areas, key=lambda a: a["share"])
fewest = min(areas, key=lambda a: a["share"])
print("Most homes with one person:", most["area"], most["share"], "%")
print("Fewest homes with one person:", fewest["area"], fewest["share"], "%")
Added below the first program, the output is Most homes with one person: 010 Zentrum 61.6 % and Fewest homes with one person: 131 Mittelstadt 32.4 %.
Share of homes with one person, selected parts of Reutlingen, 2025 (our calculation)
Area
Homes
One-person homes, %
010 Zentrum
2,939
61.6
011 Honauer Bahn
3,960
50.8
014 Schieferstr.
3,032
48.4
101 Reicheneck
412
33.3
091 Oferdingen
1,077
32.8
131 Mittelstadt
1,558
32.4
Data: Stadt Reutlingen, Kommunale Statistikstelle, Privathaushalte nach Haushaltsgröße auf Stadtteilebene, 2025 rows, licence Datenlizenz Deutschland Namensnennung 2.0, downloaded 3 November 2026. Shares and the lower bound are our own calculations.
In the city centre almost two homes in three have one person living in them; in Mittelstadt it is about one in three. Children love guessing why. One idea worth testing is that town-centre flats tend to be smaller than houses in the outer districts, but this file alone cannot prove it, and saying so is part of the lesson.
Ages 6 to 8, no screen. Ask five neighbours or relatives how many people live in their home. Make a tally with boxes 1, 2, 3 and "4 or more". Then try to work out the total number of people. Where do you get stuck?
Ages 8 to 10, Scratch. Make four sliders for the four groups and a sprite that says "At least ... people". Test it with Zentrum's numbers.
Ages 10 to 12, Python. Change the first program so it works out the "at least" number for every area in the file, then find the area with the biggest one.
School in Baden-Württemberg
When will a Reutlingen child meet Informatik at school?
In grade 5, now that Baden-Württemberg has a compulsory subject for it. The four Grundschule years come first.
Computing in school for a Reutlingen child
Grades
School
What happens
1 to 4
Grundschule
Comes before the new Informatik subject
5 and 6
Every secondary school type
The new required subject Informatik und Medienbildung (from 2025/26)
Later grades
Secondary school
The subject is being introduced year by year
The KMK describes the primary stage; the GI Informatik-Monitor 2026/27, read on 2 November 2026, describes the new BW subject and places Baden-Württemberg in the small group of Länder that already reach four required Informatik hours.
So a Reutlingen child who starts coding at 7 has three or four years of practice before the first school Informatik lesson. Our lessons are not school tutoring and give no grades; they simply let a curious child build things now, and arrive in grade 5 confident. We teach alongside school, never instead of it.
Contests for primary pupils
Which contests can a Reutlingen primary pupil try in 2026/27?
Two national ones, both run through schools: the Informatik-Biber for informatics puzzles and the Mathematik-Olympiade for maths.
Informatik-Biber
Free, open to grades 3 to 13, and no previous knowledge is needed, according to the organisers, Bundesweite Informatikwettbewerbe. It takes 30 to 40 minutes, so it fits into one school lesson.
The Biberwochen 2026 run from 9 to 20 November 2026. The school registers its pupils, so the first step is a question to the class teacher.
Mathematik-Olympiade
A national maths competition with about 200,000 participants a year, which has also been offered to primary schools since 2005, according to its organisers.
The 66th Mathematik-Olympiade holds its regional round, the Regionalrunde, on 11 November 2026, after a first round at school. Again, the school is the way in.
Both contests reward the same thinking a coding class practises: read carefully, find the rule, check the edge cases. We do not reuse the organisers' tasks. Our mentors write their own puzzles, and children who enjoy them tend to enjoy contest day too. We are not connected with either competition.
Class times
What times would suit a Reutlingen child?
Reutlingen afternoons are Indian evenings, so after-school lessons work well; weekend mornings are popular with younger children.
Example Reutlingen lesson times and the time in India
Reutlingen
India in winter
India from 28 March 2027
15:50
20:20
19:20
16:10
20:40
19:40
Saturday 09:45
14:15
13:15
Sunday 11:30
16:00
15:00
Under the Einheitenzeitgesetz Germany is one hour ahead of UTC in winter and two in summer; the switch back happened on 25 October 2026 and the next switch forward is on 28 March 2027. India is always UTC+5:30: 4 h 30 later than Reutlingen in winter, 3 h 30 later in summer. Times are examples; you pick your own.
Baden-Württemberg holidays in 2026/27, as listed by the KMK
When
Holiday
26 to 30 October 2026, and 31 October
Autumn break
23 December 2026 to 9 January 2027
Christmas
25 March 2027, and 30 March to 3 April 2027
Easter
18 to 29 May 2027
Whitsun
29 July to 11 September 2027
Summer
From the Kultusministerkonferenz holiday overview for 2026/2027 (version of 9 October 2025). Lessons continue in the holidays unless you ask to pause.
Stages
What will my child be able to do, stage by stage?
Our five stages for ages 6 to 12, used to choose a group and to report progress.
Five coding stages for children (ours)
Stage
Typical age
Can do
Instructions
6 to 7
Gives steps so exact that a sprite follows them
Loops
7 to 9
Repeats actions instead of copying blocks
Numbers
8 to 10
Keeps a score and compares two values
Python
9 to 11
Types programs that count and decide
Data
10 to 12
Works out a result from a real file and says how sure it is
For parents
The household project belongs to the last stage. A child who says "at least" without being asked has understood something many adults miss.
You hear about what was built and explained, not about time spent.
For children
If a box in a table says "or more", you cannot know the exact number. Say "at least".
An honest answer with "at least" is better than an exact answer that might be wrong.
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Fees
Fees for Reutlingen families
The monthly fee includes eight live lessons. We display it in euro using the rate the European Central Bank publishes for reference; your card is debited in US dollars and your bank converts that, which can shift the final figure a little.
What families wrote on Google, left exactly as they wrote it.
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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."
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Reutlingen parents ask
Coding classes for kids in Reutlingen: parents' questions
Are the classes in German?
No. All lessons are live and taught in English only. The mentors speak slowly and clearly and adjust to your child's pace and accent, and they show far more than they say.
What age is right to start?
Six is a good age to begin with puzzles and Scratch, which needs no typing. Most children move on to typed Python at about 9.
Does my child need good English?
Basic English is enough to start. Coding lessons are very visual, mentors keep sentences short, and children pick up the words they need as they build.
When does Informatik start at school in Reutlingen?
In grade 5. Baden-Württemberg introduced the compulsory subject Informatik und Medienbildung in 2025/26, starting in grades 5 and 6, according to the Gesellschaft für Informatik.
When are classes in Reutlingen time?
Weekdays or weekends, flexible: choose your batch, or for a very personalised plan choose 1-on-1 at your convenience, weekend mornings or weekdays. The mentors are in India, where a Reutlingen afternoon falls in the evening.
What is the Reutlingen household project?
A Python exercise we built on Stadt Reutlingen's household statistics for 2025. Children find that the homes in the Zentrum area hold at least 4,852 people, and learn why a "4 or more" group only allows an "at least" answer.
Can my child take part in the Informatik-Biber?
Yes, when the school signs up. It is free, starts at grade 3, and this year the Biber weeks are 9 to 20 November 2026; the class teacher will know.
What do we need at home?
A computer with a mouse or trackpad, an internet connection and ideally headphones. For the first lessons a parent nearby helps with screen sharing.
How many children are in each group?
Between 15 and 20 children of a similar age. If you prefer, your child can have one-to-one lessons with the same mentor.
How are fees charged?
Monthly, for eight live lessons. Amounts appear in euro at the European Central Bank reference rate and are charged in US dollars, which your bank converts. The first class is free.
Mentors teach live from India, in English. A WhatsApp message is the quickest way to reach us.
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.
