There are 30 Worksheets and four quizzes, each one corresponding to the identical worksheet number in the Basic Workbook. It is very helpful for any student who might find grammar challenging. The content of the sentences covers information about the 50 States, so some incidental learning can occur. The set comes with only an answer key. Instructions are contained in the Basic Level Teacher’s Manual, therefore this set must be used in conjunction with the Basic Level Winston Grammar Program Complete Set.