3rd Grade Measurement Resources
Set the max price, then click start. A random price is generated for an item. Drag the coins onto the cash register to pay for it. Toggle the "Show total" to see how much you've paid (if needed), then click "Check" to see if you've paid the right amount.
Use this for a conversation for the perimeter and/or area of a complex polygon composed of non-overlapping rectangles. Drag the blue points to create a shape, then click one of the two buttons. Drag the sliders to move the sides.
This is based on the idea that we could approach elapsed time by comparing the relative size of the interval to the length of a day. The discussion at the end begins with "So how long would that be?" Use these visuals to make predictions, then compare it to the precise answer you get from whatever strategy you use.
A randomly generated (L-shaped) complex polygon starts as just two sides. Drag the sliders to make the rest. Meant to allow students to see the part/part/whole relationship between opposing sides.
Drag the point to change the dimensions of the rectangle. Then click the "Go" button to see the perimeter upwrap and the area fly out. Perimeter and area lie along the number line to allow conversations about their value. Works better for small rectangles.
Drag coins onto both banks (or Fill Randomly on both)
• Which bank has more? (I like that there'd be lots of ways to answer this)
• What coins would we add to make the banks equal?
Drag some coins onto one piggy bank (or Fill Randomly)
• Students tell you the value. Click to show total.
• Students tell you another way to reach the same total. Drag that onto the other piggy bank. Click show totals for both. Do they match?