NorthStar Reading and Writing: Basic/Low Intermediate

I've been using the NorthStar workbooks for a few years with my English as a Second Language students and I've found that the content in the American English versions hold students interest as they learn the basics. Some of my kids have grown up in a foreign country and did not learn English reading comprehension or writing well. I needed to find a book that was not 'babyish' for my fifteen year old but covered the fundamentals. NorthStar was my choice based on thirteen years of teaching ESL. Parents who are home schooling must find books that are age appropriate; not just language skill appropriate. Good luck.