If you're looking for a book that focuses on just the most important, most useful, and most fun stuff about your iPhone 4--you've found it

I homeschool my kids and this is a great workbook. There are enough pictures and color to be interesting without being overbearing. It has good explanations of each topic and then lots of practice pages so the kids can really get a good feel for each topic. Many workbooks just touch on a subject but do not provide enough daily assignments and then you have to supplement. This book is more than sufficient on its own. There is an answer key in the back. This is a nice thick substantial book.