K: 5 basic shapes (circle, square, triangle, rectangle, oval), shape identification, simple sorting
1st: 8 shapes including hexagon, pentagon, count sides and vertices, basic patterns
2nd: 10+ shapes, shape attributes, symmetry exploration, pattern creation
3rd: 3D shapes, geometric vocabulary, angle identification, area concepts
4th: Complex geometric relationships, perimeter/area calculations, coordinate grids, student teaching roles