May websites:

http://animal.discovery.com/
No matter what your favorite animal is, there's a good chance you'll find it at Animal Planet. Explore animals by subject, learn more about your dog or cat with the pet guides available, play fun games, and much more.

http://www.childrensmuseum.org/cosmicquest/spacestation/index2.html
Design a Space Station - with help from the Children's Museum of Indianapolis. See if you can earn a Mission Specialist's certificate.

April websites:

See if you are Smarter than a 5th grader and visit Scholastics new website that allows you to play Trivia Games. Visit http://www.scholastic.com/5thgrader/
The students are constantly checking out “I Spy” Books. To play online visit http://www.scholastic.com/ispy/play/