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.
Books _ Among the dozen or so math word_problem books of note published in the past decade, one, written by Mary Jane Sterling, from a well_known, popular brand of information books, which I'm unable to name here, stands out. The publisher has put a decent chunk of the book online at books.Google.com (go to books.google.com and search for sterling word problems).