PearDeck is not one of those tools. PearDeck is used. A lot. It's not a "just in case" by any means.
Be Internet Awesome collaborated with PearDeck to create this ready-to-go digital citizenship program. It's organized into five different units covering a variety of Dig Cit topics. And 5th grade kicked off 2021 with a focus on fake... well, really the focus was Don't Fall for Fake.Interland, which is a Google game that is fantastic for reinforcing the lessons from the Be Internet Awesome program. Did I mention all this is free?