Hands On Activities

Geometry on the floor
A short simple lesson plan about circles using the floor https://lesson-plans.theteacherscorner.net/math/geometry/

Hands-On Math Activities for grades 4-6
Hands on lesson plans for many different math concepts
https://mathcentral.uregina.ca/RR/database/RR.09.99/sawatzky1/

Math Explorer
A book that is a collection of math activities for groups. You can download a free lesson https://www.exploratorium.edu/education/publications/math-explorer

6th grade https://www.nctm.org/classroomresources/

Math Cats This is a fun one for younger kids. Math Activities Idea Bank

Math (thoughtco.com)
lots of things, including a free hands on newsletter