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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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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Algebra I
Suggested grades 9–10 · Unit 2: Linear models and simultaneous constraints
Two Constraints at a Market Stall
Use a two-equation system to distinguish total items from total revenue.
▷ 3 teacher video choices: Two Constraints at a Market StallPreview lesson: Two Constraints at a Market Stall
Goal: Solve a contextual linear system and verify both constraints.
Before this: Linear equations Substitution or elimination
Try together: Solve x+y=11 and 2x+5y=37 by eliminating x. Explain the ordered pair.
Subject-content contributionHSA.REI.C.6High school · Algebra
35 minutes
Algebra I
Suggested grades 9–10 · Unit 2: Linear models and simultaneous constraints
Average Change in a Delivery Model
Interpret a rate over an interval and distinguish it from a starting charge.
▷ 2 teacher video choices: Average Change in a Delivery ModelPreview lesson: Average Change in a Delivery Model
Goal: Calculate average change from a rule and table and state the units and assumptions.
Before this: Function notation Slope between points
Try together: For F(t)=8+2t, calculate average change over [1,5] and interpret the 8 separately.
Subject-content contributionHSF.IF.B.6High school · Functions
Earlier high school starter lessons with teacher video choices →