Perhaps considered old-fashioned but patience is still a virtue as much today as it was 60 years ago. Patience is a taught behaviour but worth teaching your kids. Teach them how to control their emotions and actions and they'll go on to reach their goals and make some great relationships in the process.
Forget educational apps, foreign language cartoons or a tutor. If you want your children to do better in school then send them outside! Numerous studies show that kids that play and learn in nature are healthier, happier and smarter.