Drop Math is a match game incorporating math drill sheets to educate and entertain. Addition is the only game mode in the Free edition. Purchase the Full version to receive Subtraction, Multiplication, Division and All game modes. Match Answers and Questions before the board fills up. The drill sheets are for children who are in the 4th and 5th grade and have used drill sheets before. Children in earlier grades can still have fun trying to master the drill sheets at lower game levels. You know your child has mastered the drill sheets when they can finish a set of 100 questions in less than 3 minutes. The game has a score sheet that shows the level obtained, high scores and grade/percentage of questions that were answered correctly. Not only is this great for educating and entertaining kids, this game can bring a challenge to adults who want to refresh their math skills or increase mental activity. No advertisements!