There’s a really long list of free high school textbooks available at the Kindle Store -
- CK-12 21st Century Physics: A Compilation of Contemporary and Emerging Technologies by Andrew Jackson and James Batterson.
A collaborative effort of the Secretaries of Education and Technology and the Department of Education that seeks to elevate the quality of physics instruction across the Commonwealth of Virginia.
- CK-12 Engineering: An Introduction for High School by Dale Baker.
Introduces engineering techniques and practices to high school students. This book is designed for a broad range of student abilities and does not require significant math or science prerequisites.
- CK-12 People’s Physics Book Version 2 by James H. Dann.
The People’s Physics Book is intended to be used as one small part of a multifaceted strategy to teach physics conceptually and mathematically.
- 9 more free kindle textbooks from the CK-12 Foundation (the link takes you to a page with all 9 listed).
CK-12 Earth Science – covers the study of Earth, its minerals and energy resources, processes inside and on its surface, its past, water, weather and climate, the environment and human actions, and astronomy.
CK-12 Advanced Probability and Statistics – introduces students to basic topics in statistics and probability but finishes with the rigorous topics an advanced placement course requires.
CK-12 Calculus – introduces high school students to the topics covered in the Calculus AB course. Topics include: Limits, Derivatives, and Integration.
CK-12 Chemistry – covers Matter, Atomic Structure; The Elements and Their Properties; Stoichiometry; Chemical Kinetics; Physical States of Matter; Thermodynamics; Nuclear Chemistry; and Organic Chemistry.
CK-12 Algebra I – an introduction to algebraic concepts for the high school student. Topics include: Equations & Functions, Real Numbers, Equations of Lines, Solving Systems of Equations & Quadratic Equations.
CK-12 Geometry – Geometry FlexBook is a clear presentation of the essentials of geometry for the high school student. Topics include: Proof, Congruent Triangles, Quadrilaterals, Similarity, Perimeter & Area, Volume, and Transformations.
CK-12 Trigonometry – Trigonometry FlexBook is an introduction to trigonometry for the high school student. Topics include: Trigonometric Identities & Equations, Circular Functions, and Polar Equations & Complex Numbers.
CK-12 Life Science – Covers seven units: Understanding Living Things; Cells: The Building Blocks of Life; Genetics and Evolution; Prokaryotes, Protists, Fungi, and Plants; The Animal Kingdom; The Human Body; and Ecology.
CK-12 Biology I – Honors
These are some really big books (10 to 20 MB each) and seem like they took a lot of time and effort to write. It’s surprising that the CK-12 foundation is giving these away free and it’s equally as surprising that Amazon is covering bandwidth costs.