Best Coding Classes in Swansea

Course picks for Swansea

Four courses for the city by the bay

Choose by the learner's interests. Every course starts with a free live lesson, and no card is asked for when booking.

Ages 6 to 12

Scratch Coding for Kids

Games and animations built from blocks, including a simple alarm that goes off when a score keeps dropping.

See the syllabus

Ages 13 to 18

Data Science for Teens

Real sensor files in Python: cleaning gaps, removing weekly patterns and detecting shifts, as on this page.

See the syllabus

University and adult

Statistics & Probability

Statistics for adults, including variation, false alarms and the trade-offs behind any monitoring rule.

See the syllabus

University and adult

Python Automation Course

Python for adults who want to automate checks on data at work, from spreadsheets to live feeds.

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

Swansea today

A student city on the Welsh coast

Census 2021 figures for the City and County of Swansea, read from Nomis and printed as the Office for National Statistics released them, with Wales for comparison.

Swansea, Census 2021
Measure	Swansea	Wales
Usual residents	238,490	Not compared
Living in households	233,322	Not compared
Aged 15 to 19	14,451 (6.1%)	5.7%
Aged 20 to 24	19,157 (8.0%)	6.0%
Aged 25 to 29	14,232 (6.0%)	6.0%
Students among residents aged 5 and over	51,845 (22.8%)	19.9%
Usual residents per square kilometre	631.5	149.9

A place to study

Of 227,063 residents aged five and over, 51,845 were schoolchildren or full-time students in 2021, a larger share than for Wales as a whole.

The early twenties

People aged 20 to 24 made up 8.0% of residents against 6.0% in Wales, while the late twenties matched the Welsh share at 6.0%.

City and country

At 631.5 residents per square kilometre, the council area mixes a dense city with Gower and the northern valleys, so it is far less crowded than its centre.

We teach Swansea learners at every stage. A Year 4 pupil in Sketty might be animating a first sprite, a Year 11 student in Morriston preparing for WJEC GCSE Computer Science, and an adult in the Uplands learning Python to automate work reports, each in a group of five to ten at the same level.

Engineering by numbers

A university founded in 1920 and a method that changed engineering

From Swansea University's published history.

19 July 1920

King George V laid the University's foundation stone, and 89 students, eight of them women, enrolled that same year. By September 1939 there were 65 staff and 485 students.

1947

The campus had just two permanent buildings, Singleton Abbey and the library, before a building programme in the following decades transformed it.

The 1960s

Professor Olek Zienkiewicz developed the finite element method at Swansea, a technique the University says revolutionised the design and engineering of manufactured products.

We have no connection with Swansea University. The finite element method belongs here because it is a computing idea at heart: break a problem too hard to solve whole into many small pieces, solve each simply, and add the results up. The project below uses the same spirit on data, adding up small pieces of evidence until they amount to something worth acting on.

Where the readings come from

Swansea Roadside is an urban traffic site in the national monitoring network, housed on a grassed frontage of the A483 Carmarthen Road beside Lyon Street, about 4.5 metres from the kerb. DEFRA's UK-AIR service publishes its ratified hourly nitrogen dioxide readings as free yearly files.

Signature project

When did the air on Carmarthen Road change?

A CUSUM detector keeps a running total of how far each day falls below normal, forgives small dips, and raises an alarm when the total grows too large.

Detecting a drop in daily nitrogen dioxide at Swansea Roadside, with a baseline learned from 2018
Rule	False alarms in 2019	First alarm in spring 2020
One day more than 2 standard deviations low	0	None all year
CUSUM, slack 0.5, threshold 4	10	14 March
CUSUM, slack 0.5, threshold 5	8	17 March
CUSUM, slack 1.0, threshold 5	0	None until 6 July

1. Learn normal

From 2018 alone: an average of 23.5 micrograms per cubic metre, highest on Fridays at 27.1 and lowest on Sundays at 18.1, with a typical daily wobble of 11.39.

2. Remove the week

Compare each day with the usual value for that weekday, so a quiet Sunday is not mistaken for a change and a busy Friday does not hide one.

3. Accumulate evidence

Add each shortfall beyond the slack to a running total that never drops below zero. When it passes the threshold, sound the alarm and start again.

When is not why

The detector at threshold 5 fired on 17 March 2020, six days before the Prime Minister's stay-at-home instruction on the evening of 23 March, as published on GOV.UK. Levels had already been unusually low since February: 16.9 on average from 1 February to 15 March, against 27.7 in the same weeks of 2019. From 23 to 26 March, readings rose to between 31.4 and 36.2 before falling to single figures at the end of the month. A detector can say that the level changed and roughly when. It cannot say what caused it; many things move nitrogen dioxide, and the page does not claim to know which did.

The yearly means tell the same story more quietly: 23.5 in 2018, 24.2 in 2019, 17.7 in 2020 and 19.2 in 2021. An annual average confirms that 2020 was different, but a whole year late. The point of a change detector is speed, and speed always costs false alarms.

Watching data change

Five settings behind every alarm

Learned on roadside air, then used on website traffic, machine sensors, bank transactions, exam results and the monitoring that keeps AI systems honest in use.

Choices a change detector cannot make for you
Setting	On Carmarthen Road	Set it wrong and
Baseline period	2018 only, before anything was tested	The detector learns the change as normal
Regular cycles	Weekday means removed first	Every Sunday looks like a drop
Slack	0.5 or 1.0 standard deviations forgiven each day	Too little and noise adds up; too much and real shifts vanish
Threshold	4 or 5 standard deviations of total evidence	Alarms every few weeks, or silence for months
What happens next	A human asks why, with other evidence	An alarm treated as an explanation

The false alarms in 2019 are not bugs. With a daily wobble about half the size of the average level, stretches of cleaner air happen by chance, and a sensitive detector will catch them. Choosing a threshold means deciding in advance how many false alarms a year you will accept in return for catching a real change a few days sooner.

Younger learners

A score that drops a little each round, a jar that collects the drops, and an alarm when the jar is full.

Teenagers

Three years of hourly readings in Python, daily means with a coverage rule, a weekday baseline and a CUSUM tuned and tested.

Adults

Monitoring rules at work, with baselines, thresholds and false-alarm budgets agreed before the alarms start.

We have no connection with DEFRA, Swansea University or Swansea Council. The readings are published on UK-AIR and the census tables through Nomis; the daily means, detectors and alarm dates on this page are our own arithmetic and make no claim about health or about causes.

Learning ladder

From a jar of drops to a CUSUM detector

The age bands are only a first guess; the free lesson finds the real starting point.

Ages 6 to 10

Keeping count

Collecting small drops in a running total, and deciding how full the jar must be before anyone should worry.

Scratch Coding for Kids Mental Maths for Kids

Ages 11 to 13

Normal and unusual

Averages and ranges in code, and the difference between one strange day and a run of them.

Python and AI for Kids Maths Through Coding

Ages 14 to 18

Change detection

Daily means from hourly data, weekly cycles removed, CUSUM tuned for false alarms against delay.

Data Science for Teens Python for Teens

Ages 18 to 67

Monitoring at work

Alarm rules for sensors, sales and systems, designed with their error rates stated plainly.

Statistics & Probability Python Automation Course

Coding and AI

Monitoring software raises alerts automatically. Why should a Swansea teenager build a detector by hand?

Because every alert rule hides a trade between noise and delay that someone chose.

An AI tool will happily flag anomalies in any data you give it. A learner who has tuned a CUSUM on real readings knows that the same data can produce ten alarms or none depending on two numbers, and that an alarm on 17 March says nothing about what happened on 23 March. That understanding is what makes an alert useful rather than just noisy.

AI systems themselves are watched this way once they are in use. Engineers track whether the data arriving has shifted from the data a model was trained on, using detectors with the same slack and threshold choices. Learning those choices on a sensor by a Swansea road gives a feel for them that no dashboard provides.

So a Swansea teenager should still learn to program in 2026, in a city where engineers learned to solve big problems in small pieces: alarms are easy to automate, and deciding what an alarm means is still a human job. The longer argument is in why coding is worth learning in 2026.

Delivery

Sketty, Morriston or Mumbles, from home

Swansea stretches from Gower to the valleys, and an evening journey across it is long. A live online lesson makes the distance irrelevant.

Gower to the valleys

A learner in Mumbles and another in Clydach can sit in the same lesson without either making the trip into town.

Welsh school years

Years 1 to 13, the Curriculum for Wales and WJEC GCSEs and A levels, named as Swansea schools name them. Lessons are taught in English.

A free lesson worth having

The first session works through a real task and ends with a suggested level, course and weekly time. Booking asks for no card.

Level first, not postcode

Groups of five to ten learners at one stage, from Swansea, elsewhere in the UK and overseas, so every level has a suitable time.

A twice-weekly routine

Two regular lessons each week, about eight a month, with holidays and exam periods agreed with the teacher beforehand.

How the clocks line up

Because Indian time never changes, India sits four and a half hours ahead of Swansea during British Summer Time and five and a half ahead in winter, which fits UK after-school and evening lessons into the teaching day.

Across south-west Wales

Families in Neath, Port Talbot, Llanelli or Pontarddulais join exactly the same classes, since all lessons are online and groups are formed by level.

Fees

Swansea lesson fees

Your first lesson is free, then there is one monthly fee.

First classUSD 0

A whole lesson at no cost, finishing with a recommended level, course and weekly slot.

Group tuitionUSD 100

Roughly eight live lessons a month, alongside five to ten learners at the same level.

Private tuitionUSD 150

Roughly eight live lessons a month, with the teacher's attention on your learner alone.

We charge every family outside India the same fee in US dollars, whether they live in Townhill or Killay, and we publish nothing in pounds. Payment starts only after the free lesson has agreed a course and a time; the pricing page sets out pauses, missed lessons and moves between group and one-to-one teaching.

Request placement Check availability

Reviews

Six Google reviews, left exactly as families posted 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

Book a free lesson for a Swansea learner

We match the first task to the learner: a running-total alarm game for a young child, a short Python program that averages a week of readings for a beginner, or the Carmarthen Road files and a CUSUM detector for a teenager ready for real data.

FAQ

Swansea coding class questions

What Swansea families ask us most.

How many people live in Swansea?

The 2021 census counted 238,490 usual residents in Swansea, of whom 233,322 lived in households and the rest in communal establishments such as student halls and care homes.

How does Swansea compare with Wales?

In 2021, 8.0% of Swansea residents were aged 20 to 24 against 6.0% in Wales, 22.8% of those aged five and over were students against 19.9%, and there were 631.5 residents per square kilometre against 149.9.

What is a CUSUM detector?

A cumulative sum rule that adds up how far each new value falls short of normal, minus a small allowance, and raises an alarm when the total gets too big. It notices small, steady shifts that no single reading would reveal.

Did the detector notice spring 2020?

It found a drop, first flagged on 17 March 2020 at one setting and 14 March at a more sensitive one, both before the stay-at-home instruction on 23 March. Levels were already low from February, so the page makes no claim about the cause.

Where do the air readings come from?

DEFRA's UK-AIR service publishes ratified hourly readings from the Swansea Roadside monitor on the A483 Carmarthen Road as free yearly files. We used 2018 to 2021.

What did Swansea University contribute to computing?

The University says Professor Olek Zienkiewicz developed the finite element method there in the 1960s, a technique that revolutionised how manufactured products are designed and engineered. We are not connected with the University.

At what times do Swansea lessons run?

On weekday afternoons and evenings or at weekends, at a UK time chosen in the free lesson. India is four and a half hours ahead of Swansea in summer and five and a half hours ahead in winter.

Is there a Modern Age Coders centre in Swansea?

No. We have no Swansea centre and no premises anywhere in the UK; every lesson happens live online. A learner needs a computer with sound and a reliable connection, and our phone number is Indian.

How much do Swansea lessons cost?

The first lesson is free. After it, a group place is USD 100 a month for two live lessons a week, about eight a month, with five to ten learners, and one-to-one lessons on the same pattern are USD 150 a month. Course, format and time are agreed before any charge.

How are Swansea groups formed?

By level, pace and goals rather than age or postcode, with five to ten learners at one stage. When no group fits the learner's week, we offer one-to-one lessons.

Explore Wales and the UK

Welsh pages and other cities

Along the M4, the Cardiff page tests whether its size fits Zipf's law. The Wales guide covers coding across the Curriculum for Wales, and exam help lives on the WJEC GCSE Computer Science and WJEC Digital Technology pages. Over the Bristol Channel, Brighton and Hove slides an eight-hour window over a different kind of air reading.

Book the free class Message us on WhatsApp

Four courses for the city by the bay

Scratch Coding for Kids

Data Science for Teens

Statistics & Probability

Python Automation Course

Python, AI, vibe coding and agentic coding

Vibe Coding for Teens

Python Automation Course

AI and Machine Learning for Teens

Codex & Claude Code

A student city on the Welsh coast

A place to study

The early twenties

City and country

A university founded in 1920 and a method that changed engineering

19 July 1920

1947

The 1960s

When did the air on Carmarthen Road change?

1. Learn normal

2. Remove the week

3. Accumulate evidence

When is not why

Five settings behind every alarm

Younger learners

Teenagers

Adults

From a jar of drops to a CUSUM detector

Keeping count

Normal and unusual

Change detection

Monitoring at work

Monitoring software raises alerts automatically. Why should a Swansea teenager build a detector by hand?

Sketty, Morriston or Mumbles, from home

Gower to the valleys

Welsh school years

A free lesson worth having

Level first, not postcode

A twice-weekly routine

How the clocks line up

Swansea lesson fees

Six Google reviews, left exactly as families posted them

Book a free lesson for a Swansea learner

Swansea coding class questions

How many people live in Swansea?

How does Swansea compare with Wales?

What is a CUSUM detector?

Did the detector notice spring 2020?

Where do the air readings come from?

What did Swansea University contribute to computing?

At what times do Swansea lessons run?

Is there a Modern Age Coders centre in Swansea?

How much do Swansea lessons cost?

How are Swansea groups formed?

Welsh pages and other cities

Keep exploring Modern Age Coders

Coding classes in nearby cities

Free resources

From the blog

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