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
Clear filters30 minutes
World History
Suggested grades 9–10 · Unit 3: Conflict and International Institutions
Separate a Trigger from Conditions for War
Use a short World War I timeline without treating order as a complete explanation.
▷ 2 teacher video choices: Separate a Trigger from Conditions for WarPreview lesson: Separate a Trigger from Conditions for War
Goal: Distinguish trigger, prior condition and later event, then evaluate an overly simple causal account.
Before this: Read a timeline and evaluate multi-causal explanations.
Try together: Together explain why Germany’s August invasion cannot be the cause of the earlier June assassination in this proposed sequence.
Supporting literacy connectionRH.9-10.3Grades 9–10
Subject-content alignment not yet verified30 minutes
World History
Suggested grades 9–10 · Unit 3: Conflict and International Institutions
Read an Institution’s Founding Purpose Critically
Summarize the creation of the United Nations while distinguishing aspiration from historical evaluation.
▷ 2 teacher video choices: Read an Institution’s Founding Purpose CriticallyPreview lesson: Read an Institution’s Founding Purpose Critically
Goal: Write an accurate summary of two founding dates and explain what the founding account can and cannot demonstrate.
Before this: Distinguish an intended purpose from an observed result; summarize a source accurately.
Try together: Discuss whether knowing an organization’s goal is useful even when it does not establish success.
Supporting literacy connectionRH.9-10.2Grades 9–10
Subject-content alignment not yet verifiedEarlier high school starter lessons with teacher video choices →