Spelling City- https://www.spellingcity.com/
Seesaw- https://app.seesaw.me/#/login
Math Websites
https://xtramath.org/#/home/index
by standard...
https://www.mrnussbaum.com/second-grade-operations-and-algebraic-thinking/
https://www.mrnussbaum.com/second-grade-numbers-and-operations-in-base-ten/
https://www.mrnussbaum.com/second-grade-measurement-and-data/
https://www.mrnussbaum.com/second-grade-geometry/
https://www.topmarks.co.uk/maths-games/7-11-years/place-value (choose a category at the top/ all concepts are there)
websites that have all concepts:
https://www.sheppardsoftware.com/math.htm
http://www.abcya.com/second_grade_computers.htm#numbers-cat