* separar palavras-chave com vírgula
Melhores sites assessment 1-15:
1.
socrative.com 
66,760

2.
edutopia.org 
48,341

3.
cocubes.com 
45,390

4.
wikileaks.org 
34,704

5.
wikifx.com 
28,858

6.
laopiniondemurcia.es 
31,198

7.
postcourier.com.pg 
27,300

8.
missoandfriends.com 
26,439

9.
activityvillage.co.uk 
24,422

10.
krazydad.com 
24,314

11.
sudoku.name 
24,042

12.
coolsite.co.il 
23,816

13.
youplay.com 
22,309

14.
mindgames.com 
22,230

15.
kakuroconquest.com 
16,715