Subtracting Sardines HD

Good app!

The modular approach of this app series is perfect. Switching apps helps our daughter visualize that we are doing a different concept, which is so helpful when first learning. It's great that the sardine visual is so different than the apples, because it really helps my daughter understand that it's a different process being performed. She thoroughly enjoys the graphics and giggles while learning math--how often does that happen!

I love adding apples and when I started a subtraction unit I was excited to see Subtracting Sardines. It's a very simple concept but kids will play for hours. My only problem is that it allows kids to take away a larger number than they started with. Red sardines appear and the answer is a negative number. For a visual approach this doesn't work. It would be fine if we were hopping on a number line, but my first Graders don't understand that when you are dealing with real objects you can't take away more than you started with. Please add an option to lock negative numbers and I would give it 5 stars.