ESL Teaching Kindergaten?

I have used this workbook a href="http://www.pearsonlongman.com/ae/marketing/sfesl/" rel="nofollow"http://www.pearsonlongman.com/ae/marketi…/a . It's pretty simple and keeps the kids' attention. The red one is for kindergarten, but I think they could use the purple first grade textbook and workbook toward the end of the year if they are doing pretty well. Also, they have a series of big books for the kindergartners that go with the workbooks. We liked reading them together, lots of good vocab and repeated sentence structures.