Guided sessions
Learn each topic in short steps with pictures. Lexie asks you questions as you go.
AP Biology course
Lexie guides you through every unit of AP Biology, one step at a time. Each lesson ends with exam-style questions and a free-response practice test. Lexie scores your answers point by point, so you know what to fix before the exam.
What is in every lesson
Each lesson teaches one part of the course framework. You learn it in a guided session, then you practice it until you know it.
Exam-style questions
Multiple-choice questions on data and experiments, with feedback on every wrong answer.
Free-response feedback
Write your answer to an AP-style free-response question. Lexie scores it point by point.
Flashcards
Remember the key terms. Lexie asks the cards you miss more often.
Listen
Listen to the lesson text on the bus or on a walk.
The course
The course follows the College Board course framework for 2025-26. Start with the skills lessons, or go straight to the unit you study in class. Each virtual lab sits next to the lesson it belongs to.
Science Practices: Skills for the AP Exam8 lessons
Unit 1: Chemistry of Life3 lessons
Unit 2: Cell Structure and Function7 lessons
Unit 3: Cellular Energetics6 lessons
Unit 4: Cell Communication and Cell Cycle3 lessons
Unit 5: Heredity4 lessons
Unit 6: Gene Expression and Regulation7 lessons
Unit 7: Natural Selection9 lessons
Unit 8: Ecology7 lessons
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The exam at a glance
How the AP Biology exam works.
- Length
- The exam takes 3 hours and has two sections.
- Multiple choice
- 60 questions in 90 minutes. This section is 50% of your score.
- Free response
- 6 questions in 90 minutes: 2 long and 4 short. This section is 50% of your score.
- Format
- You take the exam in the Bluebook app. You write the free-response answers by hand.
- Skills
- Many questions give you an experiment, a graph or a data table. You must use them, not only recall facts.
- Formulas
- You get the AP Biology equations and formulas sheet during the exam.
- Scores
- Scores go from 1 to 5. Many colleges give credit for a 3 or higher.
- Units
- 8 units, from the chemistry of life to ecology.
How the course works
The exam rewards skills as much as facts. About half of the points come from experiments, graphs and data. So the course has two parts that work together.
The 33 content lessons teach the 8 units. The 8 skills lessons teach the science practices: task verbs, experimental design, graphs, statistics, the formula sheet, models and claim, evidence and reasoning. The 13 virtual labs walk you through the College Board lab investigations with real-looking data.
Every lesson has the same parts: a guided session, multiple-choice and fill-in questions, flashcards, think questions and a practice test with one AP-style free-response question.
Frequently asked questions
No. Lexie wrote this course. It follows the College Board course framework for AP Biology, 2025-26, but the College Board does not make or endorse it.
The lesson "Cell Structure and Function" is free, with every part: the guided session, the questions, the flashcards and the practice test. The other 53 lessons open with a Lexie Pro Pass or a Lexie Pro subscription.
Each practice test has a scoring guide, in the same style as the exam. Lexie reads your answer and gives one point for each idea in the guide. It shows which points you got and what was missing.
No. The lessons teach everything the questions ask. You can use the course next to your class textbook, or on its own.
Yes. 13 virtual labs walk you through the College Board investigations: the question, the setup, the variables, a data set and the analysis. The exam asks about these designs.
Yes. The course runs in the browser on a phone, a tablet or a computer.
Sources
The course follows the College Board AP Biology course framework, 2025-26. A separate fact check compared every lesson with the framework and with published sources. AP and Advanced Placement are registered trademarks of the College Board, which is not affiliated with Lexie and does not endorse this course.