There are many websites that offer collections of instructional materials that can be used by teachers. Here is a list of some of these sites that might be helpful sources of materials you may use in instruction.
From the Monterey Institute for Technology and Education, HippoCampus is a collection of education multimedia content. It is one of many open education resources. Organization is by subject area, including Math, Natural Science, Social Science, and Humanities (religion only). The most content available is in math. A list of learning objectives is available.
This Open Educational Resources site was created by ISKME (Institute for the Study of Knowledge Management in Education), a non-profit helping the education community collect and share information through open source technologies. Free, openly licensed educational resources—including activities, assessments, lecture notes, lesson plans, videos, etc.
“A clearinghouse for accessing video, audio, documents, images, and interactive teaching/learning games … for use across the curriculum and for various grade levels”. Several ways to sort results. Science-related materials are the largest group.