An exercise in modeling a real life tile pattern

What a great exercise it would be for a child to figure out how to “model” this wall with only equilateral triangles and squares. This is exactly the kind of thinking that the writers of the Common Core Math standards illustrate in the draft of their Geometry Progression for Grades K-6, pp. 7, 11-12. Geometiles™ were used for the modeling task, as shown above….
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Three sisters and their PJ’s

When I saw Grace, Sophie, and Chloe in their mismatched pajamas, a question immediately popped up:   if there are 3 sisters, and 3 pairs of pajamas, how many ways are there for them to wear the pajamas so that the top and bottom are mismatched?   The 3 pajamas will be referred to by…
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A Teachable Moment At The Top Of Filbert Street

As we huffed and puffed our way up the hill, we saw this sign. I thought this would be a good time to start talking about measuring angles with my incoming 4th grader. What would happen if the cars were parked at an angle of 180 degrees to the curb? What about 0 degrees? How many…
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