I had someone email and ask me to re-post this conversation heart estimation page. Have the students estimate how many conversation hearts will fit inside the heart outline. Then have them glue hearts inside the outline and count the actual amount. Download the pdf for free here.
Here is an example. I could not find any pictures from my own class. The original idea and this picture came from Little Giraffes.
A Salute To Slumber
8 hours ago