4. Britannica
6. 50 States
7. Jet Punk
10. Idea Of America
11. Global Learning
12. Star Atlas
13. The White House
14. IXL
15. Time4Learning
16. Twinkl
17. Scholastic
18. H2O for Life
19. Kids Academy
20. Education.com
21. Kid Citizen
22. Geography Games
23. Google Earth
24. Leap Frog
25. Crash Course
26. Ducksters
27. Earthcam
28. Kahoot!
29. BBC History
30. Sporcle