The Pew Research Center article Nearly one-in-five teens can’t always finish their homework because of the digital divide by Monica Anderson and Andrew Perrin (10/26/18) provides insights on how lacking access to the internet impacts the ability to complete homework. Their chart (copied here) gives the percent of school-age children by race and income without high-speed internet. A second chart provides the results of survey about how this impacts homework. In particular,
One-quarter of black teens say they are at least sometimes unable to complete their homework due to a lack of digital access, including 13% who say this happens to them often. Just 4% of white teens and 6% of Hispanic teens say this often happens to them. (There were not enough Asian respondents in this survey sample to be broken out into a separate analysis.)
The article includes a link at the bottom for results and methodology. This includes sample sizes making this article particularly useful for statistics courses.