Used a coin to "hop" on the number line. Hopped to the right for addition (+).
Hopped to the left for subtraction (-).
Introduced plus and minus sign.
Greater or equal expression
Dinosaurs are very hungry. They will eat the pile of coins that is larger. Their mouths also look like a greater than (>) or less than (<) sign. The open mouth always points to the larger quantity.
Rectangles, squares, and area
We placed four markers on a grid to make a rectangle and a square. The rectangle and square had the same area since four grid sections were covered in both cases.
We made a rectangle with five markers on the grid but could not make a square. Some number of markers can make squares while others cannot. Interesting.....
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