Biology as a system, not a stack of notes.
Perturb a pathway and watch the consequences propagate. See how topics connect across units. Then prove it on questions built from real experimental designs.
In their words
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Nothing in biology makes sense except in the light of evolution.
Modules
Pathway Visualizer
Step through respiration and the lac operon. Add inhibitors, change O₂ or ATP demand, and trace the effects upstream and downstream.
Curriculum Map
Seven domains mapped to the AP units, with concept links across units and a misconception alert on every topic.
Drills & Practice Tests
One drill per topic, built on experiments and data, plus AP-style unit tests and a timed mock exam with rubric-graded free response.
Socratic Questions
The questions students actually ask about each topic, with short checked answers and a “think first” hint where reasoning it out is the point.
Seven domains, eight AP units
View map- MacromoleculesU1
- Cell Structure & FunctionU2
- Cell EnergeticsU3
- Cell CommunicationU4
- HeredityU5
- Gene RegulationU6
- Ecology & EvolutionU7+8
Built by a high-school student, for high-school students. Why Operon exists