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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Music
Suggested grades 9–12 · Unit 1: Rhythm and Melodic Design
Make a Rhythm That Fits and Surprises
Audit original duration patterns and distinguish meter from surface rhythm.
▷ 2 teacher video choices: Make a Rhythm That Fits and SurprisesPreview lesson: Make a Rhythm That Fits and Surprises
Goal: Create a two-measure 4/4 rhythm and justify one accent choice using a beat grid.
Before this: Count four equal pulses and add halves.
Try together: Together repair a draft measure with durations 1, 1, 1/2, 2 while preserving at least three original events.
Supporting literacy connectionSL.9-10.1Grades 9–10
Subject-content alignment not yet verified40 minutes
Music
Suggested grades 9–12 · Unit 1: Rhythm and Melodic Design
Move a Melody Without Losing Its Shape
Use an original pitch sequence to distinguish contour from interval size and absolute pitch.
▷ 2 teacher video choices: Move a Melody Without Losing Its ShapePreview lesson: Move a Melody Without Losing Its Shape
Goal: Transpose a short motif by a fixed semitone amount and explain what changes and what remains.
Before this: Read letter-name pitches and signed differences.
Try together: Together compare the original with 0, 1, 4, 3, 1, 0: it has a similar up/up/down/down/down contour but different interval sizes.
Supporting literacy connectionSL.9-10.1Grades 9–10
Subject-content alignment not yet verifiedEarlier high school starter lessons with teacher video choices →