REVERB is a new documentary series from CBSN Originals. Watch the latest episode, "The War on Science," in the video player above.

Melissa Lau, a middle-school science teacher in Piedmont, Oklahoma, with over 19 years of experience, stood by the doorway of her classroom as the last few of her first-period sixth grade students filed in and took their seats.

"Hey guys, you need your papers from yesterday, and a pencil," said Lau, launching into the day's lesson. "So, how can I identify misleading information? I know you guys know conspiracy theories. You guys watch enough YouTube to know what that stuff is." Lau told CBSN Originals that the rise of pseudoscience on the video-sharing platform has made her job teaching science more difficult — and more important.

Since its launch in 2005, YouTube has amassed an audience of over 2 billion monthly active users. Part of the secret of its success is the personalization algorithm that suggests videos based on viewing habits, a process that can create a feedback loop of misinformation. With just a click or two, students can be drawn into debunked and anti-scientific diatribes about climate change, evolution, and even whether the Earth is flat.

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