Challenge Exercises Teacher's Workbook: Year 3 - Level 1 (Pre-K - Grade 1)Level 1 Challenge Exercises are designed to be used in conjunction with the Early Elementary Root Posters. They are highly visual, because students at this level are still beginning readers. Level 1 workbooks are only produced in a Teacher's Workbook, because students at this level typically do not have individual workbooks. Teachers can make copies of exercise pages to distribute in class and can walk students through the exercises together as a