This page is dedicated to apps for your computer/smartphone/tablet/etc. that you might not know about that perform functions you will definitely need. Not necessarily for your class assignments, but they're useful.
It should be noted that all apps are one of many and these are examples, will be free but may have a pro version or ads, and we receive no money or compensation for their promotion.
Some phone cameras also have a "scanner" mode built in now too! However if you'd like an app to automize and clean up your images, etc. try one of these to start (there are many, many more - free and paid). If you don't have a scanner, if you have a smartphone, you do now.
CamScanner by INTSIG Information Co. is a great app for scanning using your cell phone (can also do with a tablet, but cell phones usually have better cameras). This will scan documents and automatically trim out anything in the background, like a table or desk so you have something that looks like you scanned it on a flatbed. You can combine multiple pages, edit the image, turn it into a PDF, utilize OCR (make it a readable PDF image), etc. It's easy to send and share as well. If you must absolutely fax something and can't find a machine, it will fax, although this might be a paid service.
Camera Scanner to PDF by Smart Media is essentially the same as CamScanner, but looks a bit different. As always, it depends on your preferences. *This link is to the GooglePlay/Android version. You can see other scanner apps suggested on the page it takes you to.
Every PC has software built in that takes a screenshot (search "Snipping Tool" or "Snip & Sketch"), which is brilliant and easy to use. Snip&Sketch is on newer versions of Windows, and Snipping Tool is on versions earlier than Windows 10.
Your phone may or may not have built in screengrab software as well. For example, the Samsung Galaxy offers "Smart Select" which allows not only a screen grab but a GIF creation. If you're not sure what your phone has, you can try to Google it or try Gyazo.
Gyazo will take screenshots and allow you to insert them into documents like normal, but it will also allow you to share your screenshots with a link - this makes sharing so much easier via chat, messenger, email, etc. It will also let you create up to 7 second GIFs and videos. It takes a very small learning curve and it has great instructions. It can be used on your desktop, laptop, tablet, or Android/Apple smartphone or other device.