> It's important that children gain basic technical literacy

They certainly will at home.

> I suspect there is a gap in the technical literacy of lower income students, whose parents are less likely to have a computer at home.

In which country?

I live in Mexico and even here you really need to go to the poorest families to find a home without a laptop. Even those families have multiple smartphones. Today a smartphone is not a good replacement for a laptop but maybe in a couple of years it will be.

Even if they have a computer at home, that doesn't mean they're practicing the relevant skills. Touch typing, word processing, researching a topic online, etc. are things that need deliberate practice. Based on my own experience, using a computer at home 99% of the time meant playing video games.

The following article suggests that in the United States, about 59% of lower income households have a laptop or desktop computer, compared to 92% of upper income households.

https://www.pewresearch.org/short-reads/2021/06/22/digital-d...

Many parents don't themselves have the technical literacy to properly teach things like what thr filesystem is.