Biology curriculum

A biology course covering molecular biology, cells, genetics, evolution, physiology, ecology, and AP-style science practices.

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High school biology / AP Biology / intro college

Biology curriculum

A biology course covering molecular biology, cells, genetics, evolution, physiology, ecology, and AP-style science practices.

Pacing

8 units, 28-36 weeks self-paced

Units

8 unit sequence

Practice

16 checked answers

Support

Self-paced or tutor-guided

Outcomes

Explain biological systems across molecular, cellular, organismal, and ecological scales.
Use evidence, models, and data to justify biological claims.
Connect evolution and information flow across the whole course.

Khan Academy companion path

Use these linked courses for video instruction and mastery practice, then return here for PeerTutor original checks and tutor help on the exact unit that got stuck.

AP/College Biology

External video content is linked, not copied. PeerTutor practice is original and cites each source path separately.

Unit sequence

Built for independent progress first, then tutor support where the student gets stuck.

01
Chemistry of life
- Explain water, macromolecules, enzymes, and energy coupling.
- Connect structure to biological function.
Practice: Trace how a protein's structure supports one specific function.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Chemistry of life"?
Use membrane transport and organelle models.Connect structure to biological function.Compare prokaryotic and eukaryotic organization.Explain water, macromolecules, enzymes, and energy coupling.
Practice artifact
Which practice artifact should you produce for "Chemistry of life" before asking a tutor for help?
Trace how a protein's structure supports one specific function.Skip the unit and start a new subject.Memorize vocabulary without checking any examples.Watch videos without writing or solving anything.
02
Cells and membranes
- Compare prokaryotic and eukaryotic organization.
- Use membrane transport and organelle models.
Practice: Predict cell behavior in different solutions and justify with osmosis.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Cells and membranes"?
Explain water, macromolecules, enzymes, and energy coupling.Compare prokaryotic and eukaryotic organization.Connect structure to biological function.Use membrane transport and organelle models.
Practice artifact
Which practice artifact should you produce for "Cells and membranes" before asking a tutor for help?
Memorize vocabulary without checking any examples.Watch videos without writing or solving anything.Skip the unit and start a new subject.Predict cell behavior in different solutions and justify with osmosis.
03
Cellular energetics
- Explain photosynthesis and cellular respiration.
- Track energy and matter through pathways.
Practice: Draw a carbon and energy flow map for a plant cell.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Cellular energetics"?
Explain water, macromolecules, enzymes, and energy coupling.Explain photosynthesis and cellular respiration.Compare prokaryotic and eukaryotic organization.Connect structure to biological function.
Practice artifact
Which practice artifact should you produce for "Cellular energetics" before asking a tutor for help?
Draw a carbon and energy flow map for a plant cell.Watch videos without writing or solving anything.Memorize vocabulary without checking any examples.Skip the unit and start a new subject.
04
Cell communication and regulation
- Model signal transduction and feedback.
- Explain cell cycle control and cancer basics.
Practice: Build a cause-effect chain for a signaling pathway.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Cell communication and regulation"?
Connect structure to biological function.Explain water, macromolecules, enzymes, and energy coupling.Explain cell cycle control and cancer basics.Compare prokaryotic and eukaryotic organization.
Practice artifact
Which practice artifact should you produce for "Cell communication and regulation" before asking a tutor for help?
Build a cause-effect chain for a signaling pathway.Watch videos without writing or solving anything.Memorize vocabulary without checking any examples.Skip the unit and start a new subject.
05
Genetics and inheritance
- Use Mendelian and non-Mendelian inheritance.
- Explain DNA replication, transcription, translation, and gene regulation.
Practice: Solve a genetics problem and explain the molecular basis behind the pattern.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Genetics and inheritance"?
Compare prokaryotic and eukaryotic organization.Use Mendelian and non-Mendelian inheritance.Connect structure to biological function.Explain water, macromolecules, enzymes, and energy coupling.
Practice artifact
Which practice artifact should you produce for "Genetics and inheritance" before asking a tutor for help?
Memorize vocabulary without checking any examples.Skip the unit and start a new subject.Solve a genetics problem and explain the molecular basis behind the pattern.Watch videos without writing or solving anything.
06
Evolution
- Use natural selection, drift, gene flow, and mutation.
- Interpret phylogenies and population genetics.
Practice: Analyze an evolutionary scenario with evidence and alternative explanations.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Evolution"?
Connect structure to biological function.Explain water, macromolecules, enzymes, and energy coupling.Interpret phylogenies and population genetics.Compare prokaryotic and eukaryotic organization.
Practice artifact
Which practice artifact should you produce for "Evolution" before asking a tutor for help?
Skip the unit and start a new subject.Analyze an evolutionary scenario with evidence and alternative explanations.Watch videos without writing or solving anything.Memorize vocabulary without checking any examples.
07
Physiology and homeostasis
- Compare major body systems and feedback loops.
- Explain immune, nervous, endocrine, and transport regulation.
Practice: Model a homeostatic response to a disturbance.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Physiology and homeostasis"?
Compare prokaryotic and eukaryotic organization.Compare major body systems and feedback loops.Explain water, macromolecules, enzymes, and energy coupling.Connect structure to biological function.
Practice artifact
Which practice artifact should you produce for "Physiology and homeostasis" before asking a tutor for help?
Model a homeostatic response to a disturbance.Skip the unit and start a new subject.Watch videos without writing or solving anything.Memorize vocabulary without checking any examples.
08
Ecology and scientific investigation
- Use population, community, ecosystem, and conservation models.
- Design experiments and interpret biological data.
Practice: Complete a data-based ecology claim with evidence and reasoning.
Original practice checks
Answer in PeerTutor, then use the explanation or bring the miss to a tutor.
2 checked answers
Unit readiness
Which target best matches the Biology unit "Ecology and scientific investigation"?
Design experiments and interpret biological data.Compare prokaryotic and eukaryotic organization.Explain water, macromolecules, enzymes, and energy coupling.Connect structure to biological function.
Practice artifact
Which practice artifact should you produce for "Ecology and scientific investigation" before asking a tutor for help?
Watch videos without writing or solving anything.Skip the unit and start a new subject.Memorize vocabulary without checking any examples.Complete a data-based ecology claim with evidence and reasoning.