Math Resources:
https://login.i-ready.com/
https://www.khanacademy.org/math/cc-1st-grade-math
https://pages.sumdog.com/
Reading Resources:
https://www.kidsa-z.com/main/Login
https://www.starfall.com/h/index-grades123.php
https://www.storylineonline.net/
https://www.getepic.com/
https://www.teachyourmonstertoread.com/u/1328548
Spelling:
https://www.education.com/games/first-grade/spelling/
https://www.spellingtraining.com/index.html
Other Resources:
https://www.abcya.com/
https://pbskids.org/games/all-topics/