McGraw-Hill WONDERS (2014) 1st Grade lessons are contained in the Teacher Edition. There are six Units/Teacher Editions, each Unit contains lessons (one lesson per week, 5 days of specific skills). The WONDERS skills will be labeled or coded as, Grade 1 (1).Unit (1-6), 1.2, 1.3, 1.4, 1.5, 1.6; Week (wk-). Example: 1.2, wk-2 (Grade 1 Unit 2 week 2).