Here's a roundup of some helpful sites. Have fun exploring!
No more shoeboxes: a pyramidal diorama=triorama
A longtime favorite: Library of Virtual Manipulatives: no more flying rubber bands during geoboard activities.
Some general sites for activities and lessons:
Don't forget TeacherTube and Google's Tools: Trends, Fonts, Sky, and Chrome extensions
Phonics
Body systems
Explore the world with Geoguessr
Animals and other wild life
Historical timeline that zooms