For a semester-length course, all seven chapters can be covered. For a shorter course, the book is designed so that chapters 1, 2, and 5 are the only ones that are required for continuity; any of the others can be included or omitted at the instructor’s discretion, with the only constraint being that chapter 6 requires chapter 4.

Discover Physics is a conceptual physics textbook intended for students in a nonmathematical one-semester general-education course.

This open-source book by Crowell, Robbin, and Angenent is a spin-off of a previous open-source book by Robbin and Angenent. It covers the first semester of a freshman calculus course.

This is a textbook on general relativity for upper-division undergraduates majoring in physics, at roughly the same level as Rindler's Essential Relativity or Hartle's Gravity. The book is meant to be especially well adapted for self-study, and answers are given in the back of the book for almost all the problems. The ratio of conceptual to mathematical problems is higher than in most books. The focus is on "index-gymnastics" techniques, to the exclusion of index-free notation. Knowledge of first-year calculus and lower-division mechanics and electromagnetism is assumed. Special relativity is introduced from scratch, but it will be very helpful to have a thorough previous knowledge of SR, at the level of a book such as Taylor and Wheeler's Spacetime Physics or my own text Special Relativity.

Liberté, by Gretchen Angelo, is a first-year college French textbook with a true communicative approach. It has been adopted by instructors at over thirty colleges and high schools (partial list below). The textbook may be downloaded for free in accordance with the license, or printed copies can be ordered. Please contact me for information on printed copies or requests for audio. Note that audio is available only to institutions adopting the text; I am sorry, but I do not currently supply them to homeschoolers or individual learners, as I simply get too many requests and cannot answer them all.

This is an introductory text intended for a one-year introductory course of the type typically taken by biology majors, or for AP Physics 1 and 2. Algebra and trig are used, and there are optional calculus-based sections. My text for physical science and engineering majors is Simple Nature.

This is an introductory text intended for a one-year introductory course of the type typically taken by biology majors, or for AP Physics 1 and 2. Algebra and trig are used, and there are optional calculus-based sections. .

This is a calculus-based book meant for the first semester of the type of freshman survey course taken by engineering and physical science majors. A treatment of relativity is interspersed with the Newtonian mechanics, in optional sections. The book is designed so that it can be used as a drop-in replacement for the corresponding part of Simple Nature, for instructors who prefer a traditional order of topics. Simple Nature does energy before force, while Mechanics does force before energy. Simple Nature has its treatment of relativity all in a single chapter, rather than in parallel with the development of Newtonian mechanics.

OpenGrade is open-source software for teachers to keep track of grades. It runs on Linux, as well as some other operating systems.

The Physics 205/206 and 210/211 sequences are intended for biology majors. If you're an engineering major, you should be in Physics 221. If you just need a gen ed class, you should be in Physics 130. Physics 205/206 satisfies your physics requirement if you're a biology major transferring to a Cal State. The prerequisites for 205 are Math 141 (precalculus) and Math 142 (trig). Physics 210/211 satisfies your physics requirement if you're a biology major transferring to a UC (or a Cal State). The prerequisites for 210 are Math 141 (precalculus) and Math 142 (trig), and the corequisite is Math 150A (calculus).

This is a set of lecture notes for my course Relativity for Poets at Fullerton College. It's a nonmathematical presentation of Einstein's theories of special and general relativity, including a brief treatment of cosmology.

This is a calculus-based physics textbook meant for the type of freshman survey course taken by engineering and physical science majors, or for AP Physics C. It uses a nontraditional order of topics, with energy coming before force. For instructors who prefer the traditional sequence, there is a drop-in replacement for ch. 0-4, Mechanics, that covers force before energy. My text for the type of course usually taken by biology majors is Light and Matter.

This a textbook on special relativity, aimed at undergraduates who have already completed a freshman survey course. The treatment of electromagnetism assumes previous exposure to Maxwell's equations in integral form, but no knowledge of vector calculus.

Spotter is a program that lets students check their answers to math and science questions. It handles symbolic as well as numerical answers. The software is free and open source.

When is an extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic. It can keep track of things you need to do on particular dates.