Mathematics
- Algebra I →Suggested: Grades 9–10
- Geometry →Suggested: Grades 9–11
- Algebra II →Suggested: Grades 10–12
- Precalculus and Trigonometry →Suggested: Grades 11–12
- Statistics and Probability →Suggested: Grades 10–12
High School Curriculum Explorer · Grades 9–12
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See what a course builds on, follow a suggested unit path and practice a useful skill. For students, families, homeschoolers, tutors and teachers.
138 original mini-lessons with video choices23 courses9 subject areas
Suggested pathways · Selected standards contributions · No calculus
A starter map, with no accreditation or graduation credit.
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Each course has six lessons in three suggested units. Grade ranges guide placement; they are not universal requirements.
English language arts
- English 9 →Suggested: Grade 9
- English 10 →Suggested: Grade 10
- English 11 →Suggested: Grade 11
- English 12 →Suggested: Grade 12
Science
- Biology →Suggested: Grades 9–10
- Chemistry →Suggested: Grades 10–11
- Physics — Algebra and Trigonometry →Suggested: Grades 11–12
- Earth and Environmental Science →Suggested: Grades 9–12
Social studies
- World History →Suggested: Grades 9–10
- United States History →Suggested: Grades 10–11
- Civics and Government →Suggested: Grades 11–12
- Economics and Personal Finance →Suggested: Grades 11–12
Visual arts
- Visual Arts →Suggested: Grades 9–12
Music
- Music →Suggested: Grades 9–12
Health and physical education
- Health and Physical Education →Suggested: Grades 9–12
Computer science and digital literacy
- Computer Science and Digital Literacy →Suggested: Grades 9–12
World languages
- Spanish I →Suggested: Grades 9–12
- Spanish II →Suggested: Grades 10–12
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2 matching lessons
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Biology
Suggested grades 9–10 · Unit 2: Matter and Energy in Organisms
Where Does Plant Carbon Come From?
Represent photosynthesis inputs, outputs and energy transformations using an atom-accounting model.
▷ 2 teacher video choices: Where Does Plant Carbon Come From?Preview lesson: Where Does Plant Carbon Come From?
Goal: Use a labeled model to track carbon atoms and distinguish light energy from matter inputs.
Before this: Count atoms in simple formulas.
Try together: Together identify the error in a diagram drawing light dots turning into carbon dots. Replace it with an energy-transformation arrow.
Subject-content contributionHS-LS1-5High school band
Supporting literacy connectionRST.9-10.7Grades 9–10
Selected NGSS high school-band contribution; full performance requires additional evidence and instruction.40 minutes
Biology
Suggested grades 9–10 · Unit 2: Matter and Energy in Organisms
Food, Oxygen and Energy Transfer
Explain cellular respiration without describing energy as an atom or saying bond breaking alone releases it.
▷ 2 teacher video choices: Food, Oxygen and Energy TransferPreview lesson: Food, Oxygen and Energy Transfer
Goal: Use a net model to distinguish matter rearrangement, usable energy transfer and thermal transfer.
Before this: Recognize photosynthesis inputs and outputs.
Try together: Together correct “Plants photosynthesize, so they never respire.” Refer to the text and distinguish the two processes.
Subject-content contributionHS-LS1-7High school band
Supporting literacy connectionRST.9-10.1Grades 9–10
Selected NGSS high school-band contribution; full performance requires additional evidence and instruction.Earlier high school starter lessons with teacher video choices →