This iPhone/iPad app is currently FREE in the iTunes store. It is geared for preschoolers/grades (K-1). It meets Common Core Standards for kindergarten but please note that the standards are more rigorous for first graders who are expected to add & subtract within 20. With the help of a cute little penguin, kids subtract (up to 9) using sardines. There are a lot of good things about this app. The sardines are displayed on a keyboard with domino like keys (number on the left/picture on the right). The child chooses a subtraction problem and the sardines appear at the top of the screen. Here’s how it works: If a child chooses 7 – 2: 7 sardines appear then 2 sardines are taken away. As the child counts the remaining fish, they are encased in ice. Only the bones left behind of the subtracted fish and they disintegrate if touched. The app even allows for subtraction problems with negative answers (red fish joins the left over bones). Children earn gold coins as they work. Nicely done app that helps kids with the beginning concept of subtraction.

Common Core Standards met:

• K.OA.2  – Add and subtract within 10, e.g., by using objects or drawings to represent the problem.

Highly Recommended!