Khan Academy has some lessons aimed at fairly young kids—counting, spotting gaps in counting, talking that simple. I tried to sit with my son on the Khan Academy iPad app a few weeks ago to do some with him, thinking it'd be great. Unfortunately it is (or seemed to be to such a degree that I'm about 99% sure it is) janky webtech, so glitches and weirdness made it too hard for my son to progress in without my constantly stepping in to fix the interface. Things like, no feedback that a button's been pressed? Guess what a kid (or hell, adult) is gonna do? Hammer the button! Which... then keeps it greyed out once it does register the press, but doesn't ever progress, so you're stuck on the screen and have to go back and start the lesson over. Missed presses galore, leading to confusion and frustration that nothing was working the way he though it was (and it, in fact, supposed) to work.

I don't mean to shit on Khan Academy exactly because it's not like I'm paying for it, but those lessons may as well not exist for a 4 year old with an interface that poor. It was bad enough that more than half my time intervening wasn't to help him with the content, nor to teach him how to use the interface, but to save him from the interface.

This is utterly typical, too. We just get so used to working around bullshit like this, and we're so good at it and usually intuit why it's happening, that we don't notice that it's constant, especially on the web.