Florida B.E.S.T. MA.1.GR.1.3
The Standard
Compose and decompose two- and three-dimensional figures. Figures are limited to semi-circles, triangles, rectangles, squares, trapezoids, hexagons, cubes, rectangular prisms, cones and cylinders.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students join smaller flat shapes or solids to make a named larger figure. They also separate figures into named parts and show more than one possible arrangement.
What Mastery Looks Like
- A student can make a hexagon from two pattern-block trapezoids and a rectangle from two matching triangles, then name the parts and wholes. They can join cubes into a rectangular prism, take it apart, and sketch where the pieces meet.
Common Misconceptions
- Students may think turning a triangle or solid changes its name. They may believe a figure can be built or split in only one way. They may leave gaps or overlaps, or misname the outer figure.
How to Assess It
- Give each student two matching right triangles and four connecting cubes. Say, "Make a rectangle and a rectangular prism, then sketch each whole, show the joining lines, and label the parts."
Lesson moves
Ways to Teach It
Give pairs paper triangles, squares, trapezoids, and semicircles, plus cubes and cylinders, to build and split named figures.
Ask, "Can the same hexagon be made in two ways?" Students build examples, then explain which pieces they used.
Play Shape Build Bingo: students draw a target card, combine the listed pieces, and cover the matching whole.
Use blocks to design a small playground with cones, cylinders, cubes, and rectangular prisms, then label each solid.
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Printable MA.1.GR.1.3 Worksheet
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