256 items (16 sets of 16 items each) with answer keys. Can be used for bell work, test prep, practice, or homework. Each item is aligned to CCSS standards. The items in these practice sets can be used to prepare students for an Algebra 1 End of Course Exam aligned to CCSS or similar. The series gradually increases in scope, rigor and depth. The items follow formatting, structure and style that is typical for EOC exams aligned to CCSS (open ended, multiple choice, multiple selection, and more).