Geometry

Solo Lines, Rays, and Angles: https://www.splashlearn.com/geometry-games-for-4th-graders

Solo Quadrilaterals: https://www.iknowit.com/lessons/d-geometry-quadrilaterals.html

Pairs Triangles: https://cardgames.io/triangles/

Tangrams: https://www.mathplayground.com/tangrams.html