Indicates that the item is a Top Pick. The full review is available in 102 Top Picks for Homeschool Curriculum.
Graphite is a site that hosts teacher reviews and ratings for online games and websites as well as apps that is free with no registration required.
MIT OpenCourseWare has free AP test prep for Biology, Chemistry and Physics.
At Online Learning Fun With Physics, Maryville University has groups of links to other educational websites (free) with topical lesson material and/or videos on physics topics under the headings Motion, Heat and Thermodynamics, Light, Electricity and Magnetism, and Gravity.
Dan Heim hosts a weekly blog (advertisement free!) that should be helpful to homeschoolers at junior high level and above. Topics addressed are generally from astronomy, meteorology, and earth science, often determined by current events. Search "Browse All Posts" for brief interesting coverage of many topics, often with links to vetted sites.
www.HookedOnScience.org is the website of noted science teacher Jason Lindsey that features a huge archive of relatively simple experiments for free.
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Disclosure of Material Connection: Some of the links in the post above are "affiliate links." This means if you click on the link and purchase the item, I will receive an affiliate commission. Regardless, I only recommend products or services that I believe will add value to my readers. I am disclosing this in accordance with the Federal Trade Commission's 16 CFR, Part 255 "Guidelines Concerning the Use of Endorsements and Testimonials in Advertising."