A complete 5 day math unit including:Full lesson plans (including centers)20 pages of Printable teaching resourcesMental Math ExerciseThese second grade math lesson plans cover common core state standards: 2. NBT.2, & 2.NBT.8.  They teach students to count by 10's and 100's forwards and backwards; identify 10 more, 100 more, 10 less, and 100 less; use place value and skip counting to solve addition and subtraction using mental math, it also includes mental math daily exercises to build s... 1 More 1 Less, Childhood Activities, Second Grade Activities, Math Exercises, Writing Lesson Plans, Early Childhood Activities, Daily Exercises, Second Grade Classroom, Math 2