Maths worksheets should challenge students and at the same time should not be a scary subject to attempt. Worksheets are a recommended mathematic learning source and an amalgam of the total syllabi. They are the top priority in the education system and are used as a learning tool by many parents, schools, teachers and students.
For seven years I've watched my beautiful son hunched over Kumon math worksheets. He finds little enjoyment from them and I'd rather see him chasing butterflies. They've certainly helped his Math performance at school __ he's top of his class, but I wonder if the effort has been worth it in the big scheme of things. He's currently solving about 100 polynomials per day. Man, he can really solve polynomials, and fast. But for what?