Third Grade:
All About William Shakespeare
Globe Theatre
Interactive Shakespeare for Kids
Fourth Grade:
Learn How to Build a Bridge with this Interactive Activity
Building Big: The Bridge Challenge
Interactive Bridge/Earthquake Activity
http://pbskids.org/designsquad/video/helping-hand-build-assistive-device/
Rube Goldberg Activities
Rube Goldberg's "Rube Tube"
http://pbskids.org/zoom/games/goldburgertogo/
Fifth Grade:
Building Big: Skyscrapers Activity