The Case Files
Every Case, from first chart to real AI
Start at the level that matches what you already know — Level 1 assumes nothing at all. Every Case is a real problem, solved with real maths and real Python.
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FreeEvery level
AI Frontier
The AI everyone's talking about — from day one
- 1A picture is just numbersComputer vision
- 2Colour in just the ballComputer vision · segmentation
- 3Draw a box around itComputer vision · detection
- 4Which word wins?Language · NLP
- 5Happy or sad message?Language · sentiment
- 6Catch the spamLanguage · machine learning
- 7Guess the next wordLLMs · how ChatGPT works
- 8The creativity dialLLMs · temperature
- 9Why AI makes things upLLMs · hallucination
- 10How connected are you?Knowledge graphs
- 11People you may knowKnowledge graphs · recommendations
- 12Find the right pageRetrieval · search
- 13Chop it up and rank the piecesRetrieval · chunking
- 14Answer using real notes, not guessesRetrieval · RAG
- 15An AI that reaches the goalAgentic AI
- 16An agent that picks a toolAgentic AI · tools
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FreeLevel 1 · Foundations
Junior Detectives
Change a number, watch it change
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FreeLevel 2 · Data & Arrays
Data Detectives
Solve real problems with charts
- 1Am I growing faster than my sister?Your first case
- 2Is this dice fair?Randomness
- 3Which day was the hottest?Finding the biggest
- 4Make a wave danceInteractive · sliders
- 5Bag a bargain!Money · percentages
- 6Where does your day go?Fractions · pie charts
- 7Will the carpet fit?Measurement · area
- 8Ask a database a questionDatabases · SQL
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AdvancedLevel 3 · Analysis
Field Agents
Real syntax, real datasets
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AdvancedLevel 4 · Machine Learning
Lead Investigators
Data science → real AI