Educator Online STEM Resources

The mission of Understanding Science is to provide a fun, accessible, and free resource that accurately communicates what science is and how it really works.
BrainPOP offers cross-curricular animated movies, learning games, interactive quizzes, primary source activities, and a breadth of additional resources for students. 
The Concord Consortium hosts a vast number resources from research in science, mathematics, and engineering education to teacher ready resources for discipline specific instruction. Lessons, aligned to the new science standards, include online simulations and student directions. These resources are offered open source and free of charge.
The Education Development Center (EDC) is developing, field-testing, and disseminating professional development materials for mathematics teachers in grades 6-12. These materials highlight connections between important mathematics, effective teaching practices, and the implementation of innovative instructional materials for students.
This STEM site has tools that can help you teach science, technology, engineering and math (STEM). We are currently focused on supporting the teaching of the Next Generation Science Standards (NGSS).
Next Generation Science Standards - is an updated approach to teaching science that reflects our modern world.
PHet - An interactive simulations site hosted by the University of Colorado, Boulder. Educators can provide access to student-friendly, scientifically, and mathematically appropriate simulations. In these simulations the students (or teacher if a demo) can manipulate variables and run multiple experiments. 
Developed by the Success for All Foundation, PowerTeaching Math is an instructional approach that links Common Core, state standards, and school curricula to research-proven instructional strategies and classroom resources that promote rigor and student engagement.
Science Buddies - Everything teachers need to plan, manage, and evaluate a science fair or science project in the classroom.
TeachEngineering is a site developed with NSF funding to support standards-based (NGSS and CCSS) engineering learning in K-12 classrooms. Under the "Browse" tab educators can search for lessons and units aligned to standards at their grade level.