Lately the students' parents have been asking for worksheets for every subject to be the main reference for the student to go back to while studying rather than the books! What is more important? Easier education or more useful education and knowledge??
Seems like they are using worksheets as a crutch to replace solid note taking and other student-prepared study guides. Worksheets are available on-line for many subjects if one needs extra help. I'd refer them to the book as the source and consider assigning students the job of doing worksheets for the class on a rotating basis.