1.G.A.1 Grade 1 · GeometryDistinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes that possess defining attributes.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 1.
Play the game: Shapesfree, no sign-up →Shapes are built, turned, cut and stacked, not just named. A square is an area you lay out yourself; a cube is that square stacked into layers.
Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.
1.G.A.2Build shapes and solids from smaller ones, then bigger shapes from those1.G.A.3Halves and quarters of circles and rectangles; more equal parts means smaller partsColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.