Programming and data courses

Every track is a series of 10-minute modules: a lesson that explains the idea with real examples, then questions that check your answer in the browser. The first 8 modules of every track are free.

• Python
  42 modules
  The language everything else is built on. Variables to clean, tested, well-structured code.
• Pandas
  22 modules
  Spreadsheet superpowers in code: load, clean, reshape and summarise real tables.
• PostgreSQL
  21 modules
  Ask questions of a real PostgreSQL database, from your first SELECT to schema design.
• Excel
  18 modules
  The spreadsheet every office runs on: formulas, functions, lookups, formatting, charts and PivotTables.
• NumPy
  15 modules
  Fast math on whole grids of numbers. The engine under pandas and machine learning.
• Plotly
  14 modules
  Interactive charts that tell a clear story. Express for speed, Graph Objects for control.
• Streamlit
  14 modules
  Turn a Python script into a data app. Runs here in a faithful mini Streamlit simulator.
• Flask
  16 modules
  Build web apps and APIs with a small, honest framework. Real Flask runs right here.
• Machine Learning
  18 modules
  How models actually learn, explained with intuition first and a little NumPy to prove it.
• PyTorch
  16 modules
  Deep learning from tensors to fine-tuning. You practise the maths in NumPy and the API in quizzes.
• Playwright
  14 modules
  Collect data from dynamic sites with Playwright. Practise on simulated stores that behave like the real thing.
• HTML and CSS
  14 modules
  Structure and style for the web, with a live preview that checks your page as you build it.
• Vanilla JS
  16 modules
  The language of the browser, without frameworks: logic, the DOM, events and fetch.