Brain Pop Jr. - Some resources require an account but there are some games and videos for free in all subjects!
Electronic Library for Minnesota - It helps you find articles from magazines, newspapers, and encyclopedias, plus pictures, videos, maps, and information on all subjects.
Accelerated Reader - Take quizzes and earn points on all your favorite books!
E-Learning for Kids - Explore by subject or by grade, all in a fun environment focused on learning