1.G.1 Common Core Activity
This 1.G.1 Common Core activity has 1st-2nd grade students sort colorful shape cards into houses by their number of sides, with a practice page and answer key included.
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About this resource
Description
A shape is not a shape because of its color or its size. It is a shape because of its sides and corners. This 1.G.1 Common Core activity helps 1st and 2nd grade students tell the defining attributes of a shape, like being closed and having three straight sides, from the attributes that do not matter, like color, size and which way the shape is turned.
In Defining Shapes, children sort 16 colorful shape cards into four little shape houses: 3 Sides, 4 Sides, 6 Sides and No Sides. Every card shows a shape in a new color, size or turn, so children must count the straight sides instead of matching by looks. A tall skinny triangle and a small upside-down triangle go to the same house, and a red circle and a purple oval both live in the No Sides house. Print the cards one-sided, make a few straight cuts on the dashed lines, and lay the cards on the two House Mats. A 1st grade practice page asks children to count the sides and corners of six new shapes.
What’s Included
- A colorful cover page
- A How to Use page with simple steps and prep tips
- 16 shape cards on 2 sheets, with shapes in many colors, sizes and turns
- Two House Mats with a card spot in each shape house
- A 1st grade practice worksheet: count the sides and corners
- A shape house answer key and a practice answer key
Why This Activity Helps Kids
- Sorting by the number of sides teaches children which attributes define a shape and which ones do not.
- Seeing the same shape in many colors, sizes and turns keeps children from naming shapes by how they look.
- Counting sides and corners builds the shape vocabulary that geometry standards ask for in 1st and 2nd grade.
Ideas for Teachers and Parents
Use the shape houses at a math center, in a small group or as a quick whole-class warm-up. Sort the cards by color first, then sort them by sides, and talk about which sort tells you the shape. Take the 1st grade geometry activity home and hunt for real objects with three, four or six sides. Come back to this 1.G.1 Common Core activity whenever students need a hands-on shapes review.
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