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 II
Suggested grades 10–12 · Unit 1: Polynomial and rational structure
Polynomial Operations and an Area Model
Use distribution and signs to combine polynomial expressions.
▷ 2 teacher video choices: Polynomial Operations and an Area ModelPreview lesson: Polynomial Operations and an Area Model
Goal: Add, subtract and multiply polynomials and explain why the results remain polynomials.
Before this: Distributive property Like terms
Try together: Expand (x−4)(x+2), then subtract (x²−2x−8) from your result.
Subject-content contributionHSA.APR.A.1High school · Algebra
35 minutes
Algebra II
Suggested grades 10–12 · Unit 1: Polynomial and rational structure
Rational Expressions as Quotient and Remainder
Rewrite a fraction of polynomials while preserving its original excluded inputs.
▷ 2 teacher video choices: Rational Expressions as Quotient and RemainderPreview lesson: Rational Expressions as Quotient and Remainder
Goal: Express a rational function as a polynomial plus a remainder fraction and state its domain.
Before this: Polynomial multiplication Factoring Division
Try together: Rewrite (x²+4x+7)/(x+2) and check by recombining.
Subject-content contributionHSA.APR.D.6High school · Algebra
Earlier high school starter lessons with teacher video choices →