PBS LearningMedia

www.pbslearningmedia.org

Here's another great resource for digital lesson materials and it's pretty well vetted.  PBS LearningMedia has hundreds of videos, documents and interactive content pages spanning a broad range subjects, including professional development.  As the website states:

PBS LearningMedia™ is your destination for direct access to thousands of classroom-ready, curriculum-targeted digital resources. PBS LearningMedia builds on the strength of public media and is designed to improve teacher effectiveness and student achievement. Resources are aligned to Common Core and national standards and include videos and interactives, as well as audio, documents, and in-depth lesson plans. You can browse by standards, grade level, subject area, and special collections. You can also favorite, and share resources with your class and colleagues through folders and social media. Best of all, PBS LearningMedia’s basic service is free for PreK-12 educators.

Although much of the material is academic oriented, there's a lot of good material for vocational classes as well, particularly videos and projects targeting the application of physical sciences, math, and engineering.  There is also a ton of resources for professional development - from teachers, for teachers.  It has a decent search engine and you can filter by grade level(s) and subject area(s).

It's free and only takes a minute to sign-up.

Check out this video of an introductory webinar from their Get Your Tech On series. "Find out how real-world teachers are using PBS LearningMedia to inspire their teaching, enhance learning, and empower students – and take home a “how-to” guide for easy reference whenever you need it."