You can Forward emails into a Microsoft Teams channel

Microsoft understands how much the Education world depends on email, this is why they have added the feature within teams to allow you to forward any email message to a Teams channel from Outlook. 

Just click the ellipsis next to any channel name and select “Get email address.” That generates an email address for the channel. Copy it, and you can use that address to forward Word docs, messages, or just about anything you want to add to the channel. It’s a nifty workaround and will save valuable time.