Instruct: Classify Amazon reviews into positive or negative sentiment
Query: You won't master the basics

I bought this for my two sons, ages 6 and 8, to help them develop speed with their memory math skills. What a disappointment. Even when they do know the answer quickly it can take them a good minute to find the actual answer in the game. Each playtime you must start from the beginning a work back up to where you left off. Good for review but it takes so long to get to the levels where practice is really needed. I wish I'd purchased a different product.