All of our apps avoid "talking heads," wordy explanations and artificial games that attempt to hide inherently boring repetition and memorization behind challenges that are disconnected from the nature of content to be mastered. Instead, while ensuring access to what cannot be invented, for example, that in English, the word for the shape 5 is "five," we provide ample opportunity for exploration and practice, tapping learners' curiosity, creativity and intelligence as they freely investigate and discover for themselves.