Every year, it's the same thing. The numbers 11-19 just don't fit the same rhythmic pattern that the numbers before and after seem to fit. I just finished testing number recognition (numbers in isolation) from 0-20 and the majority of the kids that were struggling weren't able to get 11-19. The most common mistake is calling the numbers with 'ty' at the end. For example, 12 is twenty, 13 is thirty, 14 is forty, etc.
Last year, I attended a math workshop in which the presenter was more than willing to seek out resources to help us meet our grade level expectations in any area we needed a little assistance. She sent me the following book and I sooo wish I would have remembered before I started teaching numbers 11-19. Now that I know exactly who is struggling, which happens to be 8 of my 22 students, I'm going to work with them in a small group to make sure they get these numbers memorized. Hopefully this book will help.
Here's a link to the mini books I'm going to use. There is a 7-day free trial.
We are also using HeidiSongs Jumpin' Numbers 11-30 DVD this year. We adore the number 17 Chicken Dance Song. :)
Do you have any fabulous ideas for teaching 11-19?