I have a friend that is looking at the Spectrum books and she is a bit overwhelmed that there are 6 Language Arts type books. She was wondering if she really needs all 6. I have never used them so I didn't know what to tell her. The books she is looking at are the Writing, Vocabulary, Spelling, Reading, Phonics and Language Arts. Are some better than others? Does she need them all? Any advice would be appreciated.