In what ways are the Internet contributing to the dumb-ing of American and the world?

Sorry, but we don't have that problem where I live.

Instead, it's the exact opposite:

'Canadians lead world in internet use: report'

'Canadians lead in time spent online, says report'

'Canadians Lead the Way in Social Media Usage'

'Canadians use the Internet more than anyone else'

'Canadians lead the way in cross-device internet usage'

'Canada Ranked #1 Best Country for Education'

'Canadians' science literacy ranks 1st among 35 countries'

'How Canada became an education superpower - BBC News'

'Richer, smarter, taller: A measure of Canada from the OECD'

'10 Smartest Countries in the World and Canada Takes Top Spot'

'More Canadians have post-secondary education than other OECD nations'

'Canada is rich in real wealth'

'Canada's middle class richest in world: report'

'Canadians get rich at a faster pace than Americans'

'Why Is Canada Rich While Other Countries Are So Poor?'

'Life in Canada, Home of the World's Most Affluent Middle Class'

'Canada is officially home to the richest middle class on the planet'

'Millionaire Cities' Abound In Canada As Household Wealth Hits Record High'

Trump posting lies on twitter.

In my opinion, the internet has both increased and decreased the access to information and therefore education. More factual information is available but more misinformation and propaganda is also available. If someone has a good basic education then that person is more likely to be able to know the difference. So educated people get even more educated and non educated people are more likely to drift off into misinformation. As always it all boils down to a quality education being very important to ones future (i.e. an education in the real world outside of the internet). The better one's basic education the better one can resist the misinformation and superstition and the better one can make use of the incredible tool that is the internet.

Unverified 'facts' and conspiracy theory sites.

One way is 'Yahoo Answers', a website where people actually expect to get decent answers.

But tbh I believe it's the opposite, more Americans and people around the world are connected to information because of the internet.