The Mailbox is a teacher magazine that delivers ideas, activities, reproducibles that help teachers with lesson plans. The Mailbox offers seasonal, holiday, curriculum, and craft ideas. The Mailbox publishes Teacher's Helper, a skill-based reproducible magazine; Bookbag, a reading and writing idea magazine; and a variety of supplemental teacher resource books that are standards based. Shop online for teacher resource materials for preschool, kindergarten, grade 1, grade 2, grade 3, grade 4, grade 5, and grade 6.