This product can be used for students to document that they have worked on or mastered the essential standards for third grade. By using this in a student data folder, it helps kids be accountable for knowing what skills you are working on, as well as their progress toward mastery.
It can also be used for teachers to track the progress of the individual growth of a student, giving another snapshot of data to share with parents. This is helpful to show parents what standards have been taught, as well as to compare where their child's strengths and deficits are in specific areas.
Work towards mastery can be marked in a variety of ways, such as a percentage, check for introduced and check mark for mastery, etc. The format is open enough that you can use it in your classroom as best suited for your needs.