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
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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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World History
Suggested grades 9–10 · Unit 1: Networks and Historical Inquiry
Distinguish Sequence from Historical Cause
Analyze an explicitly fictional port dossier to separate temporal order from causal explanation.
▷ 2 teacher video choices: Distinguish Sequence from Historical CausePreview lesson: Distinguish Sequence from Historical Cause
Goal: Build a timeline and evaluate whether two proposed causes are supported by the supplied sources.
Before this: Order events on a timeline; distinguish a source from an inference.
Try together: Together evaluate “Year 4 must have caused Year 5 because it came first.” Identify the missing reasoning.
Supporting literacy connectionRH.9-10.3Grades 9–10
Subject-content alignment not yet verified30 minutes
World History
Suggested grades 9–10 · Unit 1: Networks and Historical Inquiry
Model Exchange across Silk Roads Networks
Connect a historical overview with a simplified route model without mistaking the model for a real map.
▷ 2 teacher video choices: Model Exchange across Silk Roads NetworksPreview lesson: Model Exchange across Silk Roads Networks
Goal: Integrate a network diagram and secondary-source summary to explain two kinds of exchange and one model limitation.
Before this: Read a simple network diagram and evaluate the scope of a claim.
Try together: Discuss why “One road carried only silk directly from one endpoint to another” conflicts with the overview.
Supporting literacy connectionRH.9-10.7Grades 9–10
Subject-content alignment not yet verifiedEarlier high school starter lessons with teacher video choices →