Learner Express is a gallery of short video modules distilled from over 350 hours in the Annenberg Learner Collection. The science topics are useful in a STEM-based curriculum, while the math topics align with the Common Core Standards. You can quickly locate 1-5 minute videos to enhance classroom or professional learning. Indexed, annotated, and linked to related resources,
Simple K-12 periodically offers some free webinars on web 2.0 topics (of course, trying to entice people to become subscribers), but even the free ones include some great presenters and topics
"Mathigon provides a series of free, interactive, online courses that are designed to complement 6th grade through college level mathematics instruction. The website was founded by Philipp Legner, who studied mathematics at the University of Cambridge and mathematics education at the London School of Economics. Legner, who currently works at Google, wanted to design a website that enabled learners to examine mathematics concepts by actively engaging in problem solving. Each course explains key concepts and skills through a series of short explanations, helpful visualizations, problem sets, and quizzes. Learners receive feedback as they work their way through each course. Visitors to this website can find courses by browsing through the course library, which sorts available courses by grade level (6-9; 10-12; College, Fun and More) and by topic (Geometry; Functions and Equations; Probability and Statistics; Calculus and Mechanics; Applied Mathematics, etc.)."
Looking for inspiration for a science fair project? In need of fun, at-home science experiments? Science Buddies has over 1,000 Project Ideas in all areas of science. There is even a topic selection wizard.
Thorough post by Beth Holland about expanding research into inquiry, including have students develop essential questions rather than a topic-based process. Includes several useful links and resources
Can obtain or search by grade level, guided reading, DRA or lexile level all at one spot. Does not have all books. You can also search for similar books.