That isn't my area of expertise, but I recognize that I would like those who are experts to examine the situation and make such proposals.
I did mention one basic thing that I think would help. Better critical thinking education. Help people understand common logical fallacies. Help people consider critically that others might be lying out of self benefit and to focus added skepticism against any claims that might align with such incentives. Focus on emotion as a tool for knowing where to focus more of that light of logic on the situation and examine why those feelings arose. To not blindly believe but to seek the truth of a situation.
There's a CBC article at the top of hackernews right now, headlined "Nearly half of adult Canadians struggle with literacy" [0]
The article makes a point of stating that most Canadians leave school with those skills, but they atrophy over time until Canadians either need to re-learn them for a career change, or lose them entirely.
I'm unconvinced focusing more on reading comperhension and considering sources in school is any sort of fix here, considering those are skills we leave school with. It won't help, IMO, when 49% of Candian adults cannot disregard irrelevant information to complete a task (as referenced in the article). These are skills that won't be practiced, and therefore will be lost.