Always be on the look out for tears of frustration, so as to all the child some break. No one learns well enough when confused. At this point both concentration and effective learning are lost. But if you are sure that the tears are merely excuses to skip the homework, pretend to abandon him with the worksheets and let him sweat it out!
Children will be able to practice basic and primary arithmetic facts without the tiresome worksheets. This will also help them to practice with fun.
It is essential that as a parent or a teacher you also know how to create ways on how to teach your student effectively. Learning is best achieved when there is interaction and cooperation. In a math class, where everything seems to complicated, it is better that the children feel comfortable while learning.
Realize that children who are having difficulty with math dread math worksheets, which is reason why they procrastinate and do their homework at the last minute or after several reminds.