General Study Skills/Subject Areas:
Study Jams (Scholastic for Math & Science)
Learning Works (Best App Recommendations)
Wonderopolis (Informational text for all sorts of questions that we wonder about)
Math:
Splash Learn
Multiplication/Times Table Practice
Multiplication Fact Family Practice
Science:
Tech/Coding:
Tynker's Hour of Code (several options at all skill levels)
Kodable (Learn the basics of coding with fun mazes and puzzles)