First off, i've learned nothing since i've started using this app. Absolutely nothing. This app has taught not taught me nor my friends a single thing. There is nothing stimulating, it 100% kills creativity, and is dull. To put it simply, Aleks is boring. I've grown weary of the repetitive topics, the underwhelming knowledge checks, and most importantly, Aleks doesn't teach. I've yet to learn a single thing. Me, a young girl with ADHD, find this a very discreditable application compared to various other mathematics-teaching software. In conclusion, this program is definitely not worth the purchase. If you're looking for a good math app for school or personal use, I advise you to seek another one.