I will admit that there is one type of worksheet that I used in the past and found relatively beneficial, although it had a different kind of flaw. For my Basic Math, Pre_Algebra, and Algebra classes, I had several books of "self_checking" worksheets. These worksheets had puns or puzzle questions at the top, and as the students worked the problems they were given some kind of code for choosing a letter to match that answer. If they worked the problems correctly, the letters eventually answered the pun or riddle. Students enjoyed these worksheets, but there are a couple problem areas even with these worksheets. Some students would get the answer to the riddle early and then work backward from letter to problem answer, so they weren't learning or practicing anything.
Step 3: Flashcard Ward I have my son in a competition against my husband. I write the problems on flashcards. Whoever answers it first, gets a point. Off course my husband takes his time and makes sure to just stay within a point or two of my son. This is honestly the most effective step for my son. He tries so hard. I started offering prizes for the winner. Nothing big, you have to see how hard an eight year old will work for a cookie. When we complete these steps, he is ready to go! It has been extremely effective for Cameron. He started the school year with a 2 out of 4 as a math skill grade. His last report card just came and he is now on the 4 out of 4 level. I hope it helps you too!