Plane Shapes and Solid Figures Activity
This plane shapes and solid figures activity has 1st-2nd grade students count vertices, sides and edges on self-checking marshmallow model cards. A recording log and practice page, with an answer key included.
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About this resource
Description
Young mathematicians learn shapes best when they can count the parts. This plane shapes and solid figures activity helps 1st and 2nd grade students tell a flat plane shape, like a hexagon, from a solid figure, like a cube or a square pyramid, by counting the vertices and the sides or edges of each one.
Every card shows a shape model built from sticks and marshmallows, just like the classic toothpick-and-marshmallow math center. Children set one mini marshmallow on each round dot to count the vertices, count the sticks to find the sides or edges, and decide whether the shape is flat or solid. They write their answers on the Shape Builder Log, then open the fold-over card to check. Print the cards one-sided, fold each sheet on the center line and make a few straight cuts; every card stays joined at the fold. A 2nd grade practice page brings six new models to name as plane or solid and count.
What’s Included
- A colorful cover page
- A How to Use page with simple steps and prep tips
- 12 fold-over Shape Builder cards on 3 sheets (7 plane shapes and 5 solid figures, answers inside)
- A Shape Builder Log recording sheet
- A 2nd grade practice worksheet: plane or solid, and how many vertices
- A Shape Builder Log answer key and a practice answer key
Why This Activity Helps Kids
- Counting vertices, sides and edges builds the attribute vocabulary that geometry standards ask for.
- Placing a marshmallow on each vertex turns counting into a hands-on task, so children do not skip or double count.
- The self-checking cards let children find and fix their own mistakes during centers.
Ideas for Teachers and Parents
Use the cards at a math center, in small groups or as a whole-class warm-up. Sort the cards into plane shapes and solid figures, then line them up from fewest to most vertices. Take the 1st grade geometry activity home and hunt for real objects shaped like a cube or a rectangular prism. Come back to the plane shapes and solid figures activity whenever students need a quick shapes review.
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