Is there a way to upload 6 images in their original size to the Photo Gallery and allow classmates to be able to download those photos keeping them in original size for printing? Please be specific and simple with any answers. Thanks!

Simple to do, but it takes a few words to explain

Use the File Vault, not the Image area/editor link (that resizes) nor the gallery.

In the Editor for any page, use the "Link" icon, 3rd from the right, 2nd row.

Then click File Vault and once there use the bottom left to find the file (1 at a time) you want to store and then upload same page (instead using that dialog - easier to track work).

You then need to make a custom link to download those images. If not too large (< 1MB ) just create an "img", resize to show on a page and make it either a linkable image OR explain to classmates how to download from a browser just hovering over the image as it shows.

To make an "img", just copy and paste something you already have and just replace the image reference. Then manually adjust the dimensions with editor tools.