Latest findings from The second cycle of IEA’s International Computer and Information Literacy Study. ICILS is a large-scale, international assessment of grade 8 students’ computer and information literacy and computational thinking skills. It addresses questions relating to their preparedness to study and work in a digital future. There are overall and national breakdowns.
Something which might help them: Using the Internet Archive to check Wikipedia references. A new initiative to enable users to check the references on Wikipedia. Many thousands now link through directly to sources on the internet archive. Of course this only works for items available there but it is a great start for those with concerns about the accuracy of the referencing.