This case study looks at Common Core State Standards for math, specifically fifth grade. Common Core State Standards are a set of standards that students, in each grade level, need to meet by the end of the year. This study compares pre-test scores to post-test scores, using Common Core State Standards, that are part of the fifth grade curriculum. Protocol for the Common Core State Standards lessons include: a pre-test, intervention based on pre-test results, differentiated instruction, Quick Quizzes, and a post-test at the conclusion of the instruction. At the beginning of a new unit, students take a pretest. This is before students are exposed to any content about the unit. The Common Core provides two different tests that teachers can use. The study uses multiple choice, because it encourages students to try every problem. The pre-test scores are taken into consideration when planning lessons. Common Core provides tips to help these students during lessons. In the students’ math books, specific problems are chosen based on the lesson and time restraint. When it can benefit, students are put into partners to complete the problems. Half way through each unit there are Quick Quizzes. Once graded, the information is used to assess how well the students are grasping the concepts. Students are put into pairs based on their scores. Low scores are paired with high scores. This allows for students to collaborate and change their answers. The post tests were high, which shows that these aspects make Common Core successful.