PowerPoint science presentations for grades K-12 on space, biology, ecology, earth science, environment, chemistry, geology, natural hazards, weather, human body, general science, physics, nanoscience, and lab safety and lab work
MIT OpenCourseWare: Highlights for High School has culled introductory courses in physics, calculus and biology, along with problem sets and labs, to help students prepare for the Advanced Placement exams. The site also gathers free online courses in subj
YouTube Channel of a science teacher (Biology) at Loudoun County High School who is making videos for a flipped classroom model. Use these videos in your own science lessons.