A Reason for Spelling is designed for those who want lots of activities in their spelling lessons. Each level consists of a teacher guidebook and student workbook. Both are hefty books: the three student books I reviewed ranged from 206 to 254 pages and the teacher guidebook was 350+ pages. Levels A - F are appropriate for grades 1 - 6. Lessons are very dependent upon the teacher guidebook and presentation by a parent/teacher.