There are two practice pages for each lesson in the Grammar units and for each revising and proofreading lesson in Literature and Writing units 7, 9, and 11. The first lesson provides practice at an equivalent level of difficulty as the pupil textbook lesson. It is identified by the symbol . The second lesson provides more challenging practice for enrichment. It is identified by the symbol . One or two pages of practice are included for each lesson in Readiness units 1,3, and 5.