New Elementary Mathematics Workbook has many end-of-chapter questions for more practice, and includes periodic tests, term tests, semester tests, and year-end tests.  Please note that there is no space to work out the problems.  The workbook is not an integral component of the New Elementary Math series and it is not written by the same authors who wrote the textbooks.  It is suitable as a supplementary practice book.  The workbook comes with answer keys.