This is what they refer to:

 

 

Hard bk - will either be Math, Reading, Voygers or Spelling (look at the first heading and that will be the book do not write in these books

PB - soft practice book either will be: reading, phonics, grammar and religion can write in these books(except the Phonics)

Wk sh - work sheets

Voc wk shop bk - Vocabulary Workshop soft book

Easy Grammar - soft grammar book