By Myself, a 6 Workbook Set that is rare and each is unused and are "self-instructional" booklets for each of the actual school books to reinforce what children are learning. 

These workbooks accompany the school books; The Little White House, On Cherry Street, We Are Neighbors, Around the Corner, Finding New Neighbors, and Friends Far and Near. 

Very popular series with Tom and Susan, and Pony.  A very charming vintage set of very rare workbooks that are unused.