About Number Mountain: Numbers 21-100 Game
Number Mountain: Numbers 21-100 Game is an online Grade 2 math game for children aged 7–8. It practises the skills from the Numbers 21 to 100 lesson (Numbers to 100) with quick rounds, instant feedback and a fun challenge that keeps kids coming back.
Why Math Games Work
Games give children many short, focused repetitions without the pressure of a test. Playing right after a lesson helps new ideas stick, and replaying a few days later builds fluency and long-term memory.