The 5E Instructional Model - 
The 5E Instructional Model is an instructional model that is built around the concept that students are better able to learn by building on prior knowledge and using that knowledge to explore new ideas. This model creates a conceptual flow for students as they move through the learning process.  The Discovery Education Techbook lesson plans are based on the 5E Instructional Model and include valuable content and media for each stage.  The 5 E's are Engage, Explore, Explain, Elaborate, and Evaluate. The attached PDF provides an overview of the different stages of the 5E Instructional Model. 

http://www.discoveryeducation.com/Techbook-Welcome/getting-started.cfm - This link takes you to Discovery Education site that has 4 “Mr. Lance” videos (each under 4 min.) Great visual to show how the Techbook program can work in the classroom.  Mr. Lance is teaching a grade 6 science lesson from the DE Techbook in a Brevard County classroom at Manatee Elementary.