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Style a fictional bakery website from the first rule to a finished product card: selectors, the cascade, specificity, colours, units, typography, the box model, backgrounds, display and position, with every answer checked as you go.
Select page elements, traverse the DOM, change content, attributes, classes and CSS, handle events, run effects and read forms on a fictional outdoor shop, with every answer checked as you go.
Trace modern JavaScript the way it really runs: let/const, arrow functions, destructuring, spread, map/filter/reduce, modules, classes, promises, async/await, JSON and fetch with error handling, with every answer checked as you go.
Audit, speed up and modernise a fictional storefront's legacy jQuery: selector cost, caching, delegation, namespaces, plugin authoring, Deferreds, effects, throttling and a measured move to vanilla JavaScript, with every answer checked as you go.
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Style a fictional bakery website from the first rule to a finished product card: selectors, the cascade, specificity, colours, units, typography, the box model, backgrounds, display and position, with every answer checked as you go.
Learn how NumPy arrays and pandas DataFrames work by predicting what real code returns on a fictional bakery's data: indexing, vectorised maths, filters, sorting, statistics, groupby and CSV files, with every answer checked as you go.
Read and reason through real SQL on a fictional bookshop database: SELECT, WHERE, AND/OR, IN, BETWEEN, LIKE, NULL, ORDER BY, LIMIT, aggregates, GROUP BY, HAVING and INSERT/UPDATE/DELETE, with every answer checked as you go.
A short, plain-English explanation with one worked example. Five minutes, not fifty.
The lab opens next to the lesson. Type values and formulas exactly as you would in Excel.
Every cell is checked on the spot — with a concrete reason when something is off, and a hint when you are stuck.
Finish the lessons, pass the final exam and get a certificate anyone can verify online.
Each lab lays out real code and the data it works on. You trace it, work out the result and answer. The coach walks you through the tasks one by one.
Practise what the textbook explains until you can read and write the code without it.
Fill the gaps: the details behind the tutorials, in the order that makes sense.
Build the hands-on skills interviews test, and a certificate you can show.
SQL, Python and automation to replace manual steps and answer your own data questions.
Not just know that a join or a loop exists — trace it, predict its result and spot where it goes wrong.
Every answer is checked, so you see exactly which step you have not got yet — and fix it on the spot instead of finding out at work.
The explanation and the lab sit side by side. Read a concept, then do it yourself straight away.
When learners write one, it appears here – critical ones too.
How reviews work: only signed-in learners who bought a course or completed at least 3 lessons can write one. We read every review before it is published, publish critical ones too, and never write, edit or pay for reviews.
Pay once for the course you need. All lessons, labs, the final exam and the certificate are included, with full access.
No. Every lab runs in your browser. You only need a browser and an internet connection.
The labs are practice exercises: you read real code and its data, work out what it produces and enter the answer, which is the skill that finds bugs. They do not replace writing and running programs on your own computer, which we recommend alongside the course.
Courses cost €9.90, paid once. You get all its lessons, labs, the final exam and the certificate, with full access.
Yes. Each course page shows exactly what is inside – every lesson title, the number of labs and the exam – so you know what you buy.
When you press Check, your answers are evaluated on our server. For calculated tasks we also recalculate with changed input data, so a typed-in result does not pass. The coach explains what is off.
That you completed every lesson of the course and passed its final exam. Each certificate has a public verification link you can add to LinkedIn. It is a certificate of completion, not an official qualification.
Current stable versions. Where a database or language behaves differently between versions or vendors, the lesson says so and each system has its own course.
No. There is no analytics, no advertising and no third-party script on the site. We only set the session cookie that keeps you signed in.
Pick a course, pay once and start right away. Your progress is saved in your account.
