Build your students' ability to compose and decompose two-dimensional figures with this variation on the classic game Memory
. As your students play this simple game, they will grow stronger in their ability to compose and decompose two-dimensional figures. With shape cut-out templates for students to physically move around as they play and an assessment task to evaluate your students' ability to decompose figures, this all-in-one set will help your students develop into strong geometric thinkers.
Common Core State Standards for Mathematics addressed:
• Compose two-dimensional shapes or three-dimensional shapes to create a composite shape, and compose new shapes from the composite shapes (1.G.2)
• Decompose It! Memory
• shape cut-out
• assessment task
About the Cards
Decompose It! Memory is a simple game that your kids will pick up immediately. The sixteen cards can be sorted into eight pairs: one card that features a composite figure (yellow) and a matching card that shows the two simple shapes (orange) that the composite figure can be decomposed into. Students simply lay out the cards in a grid and take turns turning over two cards at a time. If they make a match, they get the cards and have another turn; if they don't, the cards go face down and it's the other player's turn. Once the game is over, the player with the most matches wins!
Making matches requires students to be able to mentally manipulate shapes to see how they can be used to compose a larger figure. Such mental manipulation of shapes is often difficult for students, especially when the shapes share attributes, such as two different types of triangles or a trapezoid and a parallelogram. The provided shape cut-out templates can be extremely useful, especially when the students are playing the games for the first time. The shape cut-outs match the shapes on the cards, and students can use these cut-outs by physically combining them in different ways to try to compose the larger figures. For instance, if a student flips over a card with a composite figure and another card with a triangle and a half-circle, she can take those shapes and flip and rotate them, combining them in different ways to try to make the composite figure on the card. The size of the shape cut-outs match the size of the figures on the cards so your students can even lay the shape cut-outs right on top of the card to see whether they match up.
With only eight pairs of cards, the game won't take very long to play, and the large cards make them easy for small hands. Best of all, any child who has ever played Memory will understand the game with little assistance or practice.
If your students enjoyed this game, check out Build It Up and Break It Down
, a set of 6 games and corresponding resources that will further develop your students' ability to compose and decompose 2-d shapes.
For practice with other geometry and measurement concepts, please check out the other related resources I have available –
Composing Shapes task cards + printables
Equal Shares task cards + printables (set a)
Line 'Em Up task cards + printables (set a)
Broken Rulers task cards + printables (set a)
I hope your students enjoy the game and are able to build their proficiency with 2-d shapes!