Which One Doesn't Belong? Shapes Posters

Engaging and beautiful, these shapes posters support rich geometry conversations in a wide range of classrooms.

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Do the posters in your classroom create misconceptions about shapes?

Upgrade your walls and your instruction with this new set of shapes posters by Christopher Danielson, author of Which One Doesn’t Belong? Designed to spark curiosity, creativity, and conversation about geometry, the posters address and prevent misconceptions and move beyond treating geometry as vocabulary to memorize. Just like in Christopher’s book, each shape is a right answer because each shape has a reason not to belong. Students can talk about their reasons using informal everyday words, specialized mathematical vocabulary, and a mix of both. Often, these posters will spark a need for a new word as well as clarity about its meaning.

The posters are appropriate for grades K–8 and beyond. For example, younger students considering the Which Triangle Doesn't Belong? poster will discover that a triangle is a closed shape with three straight sides, no matter which way the triangle is "pointing." Middle grades students will notice and compare attributes of different types of triangles (right, isosceles, scalene, equilateral). Older students will engage with the geometry of special right triangles. All students will wonder, and notice, and think about relationships over time.

Each set of eight 18-by-24-inch posters includes one for each of the following: square, rectangle, rhombus, triangle, hexagon, polygon, shape, and curve.

These shapes posters complement the Which One Doesn't Belong? Student Book and Teacher's Bundle. Click the links for ordering options.


About the Author(s)

Christopher Danielson has worked with math learners of all ages, from teens in his former middle school classroom to his own children, from calculus students to elementary teachers to families who visit his Math On-A-Stick learning space at the Minnesota State Fair.

Product Details

Grades: K, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
Media: Eight 18" x 24" full-color posters and four-page teacher's guide
Year: 2017
Item No: 1203
ISBN: 978-162531-203-7
Hashtag: #WODB