Algebra I
The course the house teaches from for this shelf: videos, practice, and quizzes that check you as you go.
Open it free →
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📚 The Library → 🎒 High School → 9th Grade
📚 9TH GRADE
High School · Algebra I, Biology, the full arc opens. Tap a subject — the shelf opens. Every book and lesson here is free.
🔢 Math
Algebra I: linear equations and inequalities, systems, functions, polynomials, quadratics.
CK-12 — open the Math FlexBooks
The free textbook for this shelf: read the chapter, try the practice, check yourself.
Open it free →From the House — Math
The crew is stocking this shelf with the house's own lessons. Check back — slots fill in as lessons land. Everything linked above is free right now.
✏️ Reading & Writing
The research essay: thesis, evidence, counterargument, works cited (MLA). Literature and world texts.
Reading & Language Arts — your grade level
The course the house teaches from for this shelf: videos, practice, and quizzes that check you as you go.
Open it free →CK-12 — open the English FlexBooks
The free textbook for this shelf: read the chapter, try the practice, check yourself.
Open it free →From the House — Reading & Writing
The crew is stocking this shelf with the house's own lessons. Check back — slots fill in as lessons land. Everything linked above is free right now.
🔬 Science
Biology: cells, genetics, evolution, ecology, human systems.
Science — your level
The course the house teaches from for this shelf: videos, practice, and quizzes that check you as you go.
Open it free →CK-12 — open the Science FlexBooks
The free textbook for this shelf: read the chapter, try the practice, check yourself.
Open it free →From the House — Science
The crew is stocking this shelf with the house's own lessons. Check back — slots fill in as lessons land. Everything linked above is free right now.
🌎 Social Studies & History
Government and the Constitution, article by article; U.S. history's full arc opens — colonization to the early republic.
History, Civics & Humanities
The course the house teaches from for this shelf: videos, practice, and quizzes that check you as you go.
Open it free →CK-12 — open the Social Studies FlexBooks
The free textbook for this shelf: read the chapter, try the practice, check yourself.
Open it free →From the House — Social Studies & History
The crew is stocking this shelf with the house's own lessons. Check back — slots fill in as lessons land. Everything linked above is free right now.