If an instructor asks you to provide a screen shot as proof that you attended an online event, it's very simple to do.
On a College computer -
1. Click the Print Screen key on the keyboard. It will look like nothing happened but an image of your screen has been saved to the clipboard.
2. Open Word, create a new document and click Paste.
On a cell phone or iPad it's even easier & the image automatically is saved to your camera roll.
How to Take a Screenshot on Any Device tells you how.