Hacker News new | past | comments | ask | show | jobs | submit login

If it is an April fool, then it is not entirely off the mark as satire. It isn't uncommon to see reviews of apps like Dragonbox and Slice Fractions where bloggers claim "my 5 year old can do algebra"[] or "my 3 year old can do fractions".

[] My son could play Dragonbox when he was 3, so I am not knocking the game, but I am skeptical it will be of much use when he does algebra in school.

My 5-year old daughter played through Dragonbox pretty quickly and afterward I went through some concepts with her like x/x = 1 or 1x = x.

When shown to her using fractions of a drawn circle or simple multiplication of real objects, she seemed to understand the concept in the abstract.

However, once I introduced something like ayx/yx = a, it seemed to trip her up, even though the motions in Dragonbox made sense to her.

That said, I'm not sure I understood why x/x = 1 until much after 5 years old, so maybe there's something to be said about going through the motions of computation before truly understanding the general concept.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | Legal | Apply to YC | Contact