16 Printed materials, namely, books, textbooks, teacher guides, teacher editions of student materials, research studies regarding program efficacy, posters, wall cards, teacher storybooks, implementation manuals, tutor handbooks, instructor's manuals, program manuals, flash cards, books and pamphlets for parents explaining curricular materials and strategies and containing advice on parenting, guides for students, student workbooks, student test materials, and materials for assessing student abilities, disabilities, and performance, all in the fields of reading, language arts, literacy, mathematics, social studies, student behavior, school climate, pre-kindergarten studies, special education, understanding and helping children with special educational needs, professional development for teachers, and instructional resources and strategies, as applicable to grades pre-kindergarten-12