It is a great basic skills assessment and remediation tools. In Math 8, the learners need to be able to solve linear equations as well as graph them the end of the year. With those goals in mind, there is no time to constantly review the basic math skills, such as multiplying, dividing, adding and subtracting integers. I used Digit Whiz once a week for 20 minutes for these quick fixes. The learners move at their pace within a given time frame of a month.
Overall, there are better adaptive math programs on the market than DigitWhiz. While the game-based program is attractive to students, the games are relatively simple in concept, and students will lose interest quickly. The depth of knowledge addressed in the games is fairly shallow, and there doesn't appear to be any real-world connection made. The curriculum is not very extensive, so learners who are relatively far above or below grade level will be out of luck. Bottom line: have this in your toolkit, but leave it on the bottom shelf.