BrainPOP - videos and activities that teach lessons across all subject areas
Newsela - news articles about current events and other topics in history and science that incorporate reading and literacy standards
Prodigy - games to practice math skills
Study Jams - videos with quick science and math lessons
http://studyjams.scholastic.com/studyjams/
Freckle - practice activities for ELA, math, science and social studies
https://student.freckle.com/#/login
Xtra Math - practice math facts fluency with addition, subtraction, multiplication, and division