## Thursday, September 26, 2013

### Place Value and Number Sense

At the beginning of the year, I spend a lot of time with my math group on developing number sense. Number sense can be defined simply as a student's ability to use and understand numbers. A big part of number sense is understanding place value - that the numeral 8 in the tens place represents 80, whereas an 8 in the hundreds place represents 800. One of the games that I like to play is called - rather obviously - The Place Value Game.

In class, the last 10 minutes or so is used to play this game. It gets increasingly challenging each time, as we are making bigger and bigger numbers. Each child gets a place value mat and I am in charge of the deck of cards (which includes the zero). As I draw each card, the students need to decide where to put that number - under the 10 thousands place, the tens place? Once they write a number down, they cannot erase it. We each try to get the largest number possible. This game takes knowledge of the place value system, strategy, and luck.

Then we practice reading our numbers. Currently we are practicing reading numbers into the millions place.