The "Foundation of Grammar Homeschool Student Workbook & Teacher Key" set includes two books authored by Anne Elliott, focusing on English and language study for students in 5th to 12th grade. Published in 2016 by Foundations Press in the United States, this comprehensive workbook covers grammar concepts in a clear and informative manner. With a total of 229 pages, this set is designed specifically for homeschooling students looking to enhance their language skills through engaging exercises and educational content.