Spelling You See materials are ungraded, but the series is appropriate for beginning readers through upper elementary grades. Jack and Jill is designed for children who are moving from a phonetic stage of spelling (sounding words out) to a skill development stage of spelling. In most cases, these children would be in the lower elementary grades (Kindergarten through 2nd grade).
The Instructor's Handbook for Jack and Jill (Level B) costs $16, and the corresponding Student Pack costs $30. The Student Pack includes two workbooks, a Guide to Handwriting, and a package of erasable colored pencils.
Please note that in all of my pictures I was using printed copies from a pdf review copy. Normally these materials are only available as printed workbooks.