16 Educational Materials-Namely, Spirit Master Books, Teacher Books, Posters, Bulletin Board Displays, Desktop Duplicators in the Nature of Transfer Sheets Containing Lettering and Other Materials for Use in Reproducing, Blackline Reproducible Books in the Nature of Books Having Reproducible Material, and Learning Centers-Namely, Kits Primarily Composed of Charts, Maps, Paper and Felt Cutouts, and Posters