Instructor Notes:

For materials preparations, click ‘Back to Main Menu’ button and select ‘Getting Started – EDC Setup’.

Read Every Day Counts Teacher’s Guide, Kanter and Gillespie, Great Source, 2005 or 2012 edition, p. 26-27.

On Day 19: Some days, before adding the new day’s amount, continue to pose some take away subtraction stories that encourage children to use and share their mental math strategies. See an example on the Question Card below. If you use the bills in the Depositor to act out one of the suggested strategies, make sure to put them back to match the digits before adding the new day’s amount.

As the Depositor’s amount increases, opportunities for rich discussion around students’ mental math strategies for addition grow as well. Also, some teachers use the depositor to bring meaning to the regrouping or “carrying” algorithm in which ones are exchanged for tens and tens for hundreds, whenever possible. Some have students use and share their mental math strategies first and then model the “carrying” way to check the class’s answer.

Before adding the new amount for the day, record the addition without the sum and have the class predict the outcome. (See photo.)