Fun activities will help your children succeed all year long! Mastering Basic Skills: First Grade features worksheets that cover a variety of math and language arts topics, including long and short vowel sounds, consonants and consonant blends, linking verbs, addition and subtraction to 20, skip counting by 2s, 5s and 10s, identifying and counting money, measuring in inches, and more. Correlated to Common Core State Standards.159 non-reproducible pages, softcover; consumable workbook. Grade 1.