I've worked in 2 different schools in the IT department and 4 others as a volunteer lecturer (I got a name tag that said Technology Evangelist) I found that putting an analog clock on the screen saver of computers in the classroom was more likely to result in the clock actually being on time.

Too many clocks in classrooms are very old or even battery powered but neglected.

I don't think kids are dumb just they aren't getting a world that is properly maintained by competent people that care about their work and are adequately resourced to do the whole job.