Using the 100's Chart

We have been spending time on the 100's chart this week as well as Making 5.Today our focus was understanding the decades on the chart. The children were given a number and asked to tell the numbers before and after ( -1 and +1) and the numbers above and below (-10 and +10). They were able to make this as challenging as they wanted for themselves. I really enjoyed walking around and observing as they stretched their brains. Some kiddos continued with the (-1 and +1's as well as the +10's and -10's) until they almost recreated the chart. I took down the wall 100's chart too, so this was solely on understanding how the numbers work. I will be using the language 10 more and 10 less more often. Today I began with the numbers above and below. We use the term decades to describe the set of numbers before or after. EX/ Which decades come before the 30's The 20's......
Here are some interesting journals I found today.