From a teacher's perspective our competition is tough. Passing out a handout of 30 problems that are all in a format of 534x25= is not as stimulating in the students' eyes as playing games such as Grand Theft Auto and Resident Evil.
Parents, too, can start to see math as the enemy. Teachers may even tell parents that their child "struggles with concepts," a nice way of saying "your kid doesn't get it." But is this the case? Does a middle-school child struggling with math simply not understand the concepts? Often the answer to this question is a resounding "no!"
Subtract 1- or 2-digit number from a 2-digit number with/without renaming
However, caution must be taken into account when review is repeatedly covered in your classroom. You do not want your students to become bored or frustrated with the repetition.