ZornScience

ZornScience is a free website of high school science lessons, labs and practice built by Nick Zorn, a high school AP Chemistry, Honors Chemistry and AVID teacher with a B.S. in Physics and an M.S.Ed. in Instructional Technology. The site collects the materials he uses with his own students, and everything on it is free; he notes the site is self-funded and accepts optional "buy me a coffee" support.

Chemistry is the deepest section. High school and honors chemistry are organized by unit (atomic structure, quantum, ionic and covalent bonding, reactions, stoichiometry, solutions, kinetics, thermochemistry), each topic page ending with an NGSS alignment section. AP Chemistry follows the College Board's nine units, and for each topic there is a recorded video lesson paired with slide content and fully worked examples, so a student can pause and rewatch at their own pace. Physics covers linear motion, forces and Newton's laws, 2D dynamics, impulse and momentum, energy, fields, circuits, electromagnetism and waves. Biology covers ecosystems, populations, evolution, molecules of life, cells, cell division, photosynthesis and respiration, DNA and gene expression, and heredity. A Quantitative Skills section reviews numbers, units, ratios and percents, equations and graphs.

For students there are virtual labs in chemistry and physics (for example a titration lab with a pH curve), instructions for physical labs, practice activities, an ACT science prep section and a tutor page. For teachers there are classroom strategies, next-day notes, brain breaks and instructional technology write-ups. A Spanish version of the site is available.

Materials are licensed CC BY-NC-SA 4.0, so a homeschool parent may use and adapt them with credit for non-commercial purposes. There is no login and no ads. This is a strong free spine for homeschool chemistry, AP Chemistry or physics in grades 9 to 12, especially for a student who learns well from recorded lessons with worked examples, and it pairs with a lab kit for the hands-on part.