Summer Solutions Common Core Math Grade K is for students who have completed Kindergarten. The Common Core State Standards require children leaving Kindergarten to be able to count by ones and tens (to 100); compose and decompose numbers; classify and sort items into categories; fluently add and subtract small numbers; recognize, analyze, compare, and make models of geometric shapes. 30 lessons of mixed review over a 10-week period provide ongoing practice that ensures retention of these important math skills and concepts, which are addressed in Kindergarten. By completing just one lesson three days per week, students enter 1st Grade ready to learn new material right away. Click on the icons below to download a Sample Lesson and a List of the Common Core State Standards covered in Summer K Math.