For teachers

How to assign it

• Stable links. Each lesson, notes page, unit sheet and free-response question has a permanent address, such as levlprep.com/bio/notes/<topic>.html. Links do not expire and need no account.
• Question sets. practice.html?topic=<topic> opens practice on one topic, practice.html?unit=unit-1 on a whole unit. Students get feedback and an explanation for every option. The practice page can also print a set as a worksheet.
• Free-response questions. Each has its own page with the prompt, the data and a printable answer sheet with lined space. Students write, then reveal the rubric and score themselves point by point. Nothing is graded by AI.
• Printing. Each lesson, notes page, unit sheet and free-response question has a Print button. A lesson prints all its parts in one run; a free-response question prints with lined answer space, and its rubric can print on a separate page.
• Google Classroom. The "Share to Google Classroom" button on each of those pages posts the link to your class.

No login for students

Students open a link and start. They need no account, and nothing they do leaves their device unless they choose to sign in. Progress, answers and scores are stored in their own browser, and typed free-response answers stay on the device they were written on.

Privacy, in short: no ads, no cookies, no tracking across other sites, and no new personal data collected from students. The site uses cookieless analytics and sends a short report when a page breaks. Details are on the privacy page.

Access for teachers and classes

Every notes page, the glossary and the unit sheets are free. Teachers can ask for free access to the rest of the course: email [email protected] from your school address. Ask about discounts for classes at the same address.

Free-response questions

• A checkpoint gene and tumor growth Interpreting and Evaluating Experimental Results, 9 points
• Two dihybrid crosses tested with chi-square Interpreting and Evaluating Experimental Results, 9 points
• Adding a disulfide bridge to an enzyme Interpreting and Evaluating Experimental Results, 9 points
• Floating leaf disks Interpreting and Evaluating Experimental Results, 9 points
• Operon expression with lactose, glucose and tryptophan Interpreting and Evaluating Experimental Results, 9 points
• Heat and leakage from beet cells Interpreting and Evaluating Experimental Results, with Graphing, 9 points
• Potassium uptake by root tissue with and without oxygen Interpreting and Evaluating Experimental Results, with Graphing, 9 points
• Does shape affect how far a substance gets into a block? Scientific Investigation, 4 points
• Same genotype, different environments Scientific Investigation, 4 points
• One gene, several proteins by alternative splicing Conceptual Analysis, 4 points
• A side chain in the core of an enzyme Conceptual Analysis, 4 points
• Substitution versus frameshift: predict the protein Conceptual Analysis, 4 points
• A blocked step in a G protein pathway Conceptual Analysis, 4 points
• Three chemicals that act on mitochondria Conceptual Analysis, 4 points
• Nondisjunction in meiosis I and meiosis II Conceptual Analysis, 4 points
• A model of an engulfed bacterium Analyze Model or Visual Representation, 4 points
• Read a gel: which suspect matches Analyze Model or Visual Representation, 4 points
• Blood glucose and hormone levels after a meal Analyze Model or Visual Representation, 4 points
• Reading a pedigree: a bleeding disorder Analyze Model or Visual Representation, 4 points
• Alpha and beta glucose in polymers Analyze Model or Visual Representation, 4 points
• Density bands after rounds of replication Analyze Data, 4 points
• An enzyme with and without inhibitor P Analyze Data, 4 points
• Recombination frequencies and gene order Analyze Data, 4 points
• Plasmolysis in onion cells Analyze Data, 4 points
• Quorum sensing: light output and a released signal Analyze Data, 4 points

All free-response practice

Alignment with the course framework

The units and topics follow the order of the 2025 course framework, mapped to our lessons. Titles and explanations are in our own words; nothing reproduces the framework's text. The course is in Beta: it has not yet been reviewed by an AP® Biology teacher.

Skills

Each skills topic sits right after the framework topic it supports.