In this modern, technology lead world it is easy to overlook the importance of basic mathematics and mental arithmetic. When every mobile phone has a calculator built in, and every website automatically adds up your shopping cart, who needs to add up in their head? The fact is that mathematics is a vital life skill and as adults we know it is something we use every day in our adult lives. We know that it is essential that we teach our children how to do maths from a young age, but sometimes it is easy to overlook the simple steps we can take at home. We can all remember learning our times_tables at school _ one times one is one, two times two is four, and so on _ but there was a reason why we learnt this way, because it works. But it's not just about learning the times tables in sequence through repetition, it's important to get kids practicing with varying levels of multiplication problem. Working through problems and then checking the answers afterwards is a simple way to practice multiplying numbers.
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.