30 printable or digital brainstorming prompts will help you engage your students in writing what they know about MATH: What do I know about circles?What do I know about triangles?What do I know about squares?What do I know about pentagons?What do I know about hexagons?What do I know about octagons?What do I know about stars?What do I know about ovals?What do I know about spheres?What do I know about cubes?What do I know about pyramids?What do I know about addition?What do I know about subtra