P – WN – RT5

The school received a large donation from a former teacher. When the school cashed the cheque at the bank, the school noticed that they received different kinds of paper money. There were a lot of $5s, $20s, and $50s, but not many $10s and $100s. How much money was...

P – WN – RT6

Four groups signed up for a recycling challenge. After two months, two of the groups had collected a large number of items, one group collected very little, and the fourth group was somewhere in between. Arrange the number of items in descending order so that the...

P – WN – RT7

Four groups signed up for a recycling challenge. After two months, two of the groups had collected a large number of items, one group collected very little, and the fourth group was somewhere in between. How many items were collected in total? What was the difference...

P – EC – RT3

You and a friend are asked to estimate the number of attendees at your school’s graduation ceremony. If you were to estimate such a large crowd, how large would your referent be and how would you use it to estimate the number of...

P – EC – RT4

You are asked by your teacher to estimate how many books all of your classmates could fit into their backpacks. How would you determine a referent? What would your estimate be? Explain your thinking.

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates from Dr. David Costello.

You have successfully subscribed!