We are moving right along in our understanding of teen numbers and counting to 20. Kindergarteners have begun to develop the idea that 16 represents one group of ten and six "extra" ones. This idea has really helped our ability to write these numbers. When I think back to early in the year, I remember students counting and then turning and asking, "How do I write a 12?" Now, students will see a 21, 12, and 10+2 and be able to tell me that 21 is two groups of ten and 1 more, and that 12 is the same as 10+2 because it is 1 group of ten and 2 more. It is fantastic progress!
We also continued our understanding with number lines. Each kindergartener wrote down a teen number that I told them on a post-it note. Then they got in different groups and needed to put those numbers in order. They were very successful and worked as a team to sequence these numbers!