www.seusville.com
www.starfall.com
www.kidzone.ws
www.nationalgeographic.com    Click the "kids" tab
www.playkidsgames.com
www.aplusmath.com
http://gamequarium.com
www.primarygames.com
www.funbrain.com
www.learninggamesforkids.com
www.softschools.com 
​www.math-aids.com   
www.2ndgradeworksheets.net
www.ixl.com
www.reflexmath/go
https://kids.sandiegozoo.org/
https://pbskids.org/
https://switchzoo.com
http://www.mathscore.com/
https://www.storylineonline.net/
​https://www.allkidsnetwork.com/
www.abcya.com/
www.arcademics.com/
https://www.backpacksciences.com/science-simplified
​https://www.highlightskids.com/