Learn science by building
Hands-on courses that never stop at theory: every lesson pairs readable first-principles explanations with an interactive lab you can poke, drag and break — and each course ends with the real thing on your desk.
Spark Academy
Electrical engineering from the electron up — circuits, signals, semiconductors, control and computation, with a lab in every lesson.
🎯 Ends in real hardware: a 555 blinker, a PWM dimmer, firmware on a Pico — and an oscilloscope you build yourself.
Catalyst Academy
Chemistry from the atom up — bonds, reactions, moles, acids and electrochemistry, plus all 118 elements with an Eselsbrücke each.
🎯 Ends at your kitchen table: a red-cabbage pH rainbow, a stoichiometric CO₂ balloon — and a lemon battery lighting a real LED.
Progress is saved per course in this browser — with optional cross-device sync inside each course.