Make Sure They Can See It

You can test your Google site, doc, or form visiblity by going to Chrome and opening a new incognito window.
Remember that any links you add or docs or slideshows you embed must also be set to viewable permissions.

Your Google Site Website

Go to your site (you must be signed in to Drive) then click on the share icon. Make sure the PUBLISHED site (not draft) says anyone can find and view)

A YouTube Video you want students to see

Make sure you're signed into Drive with your CMS id then click the approve button at bottom of video. If only a few students are unable to view the video from their Chromebook, make sure they are signed into Drive as their CMS student email.

A Google Form

Sign in to Drive, go to the form, Click the gear wheel, make sure all the "Required Sign in options are UNCHECKED if you want parents or students to be able to do it from  home or without remembering their google drive school signin.  If you want them to be signed in to their school drive, then it is good to check these.

A Google Doc

Go to the doc, click “share” and then make sure it's Anyone on Internet, or Anyone with Link