This app uses the ABA (Applied Behavior Analysis) principles to teach children Matching Cards. The child does not have to be verbal. In fact this step is a precursor to receptive language - which is the precursor to speech and language. Depending on you child's ability, you can choose to have identical or non-identical Matching. The full package has over 1800 different cards in 22 categories. This app is useful for kids on the Autism Spectrum. There is bonus Quick Tutor section to give the child a visual representation of the images before attempting Matching if required. There is also a bonus Phonics section.