Some schools decided to block chess.com, so chess.com added a few easy alternative links to use. These links include:
https://www.schoolschoolschool.com/
https://justdoinghomework.com
https://www.pleasedontblockchess.com/
https://www.superhardalgebraproblems.com/
https://www.chezz.xyz
https://C4355.com