Illuminate is a testing site that is great to use if you have pre-existing PDF/paper tests. All you need to do is create the answer key and upload the pdf. Students can access the test via a browser or you can print out an answer key for students to fill out. If you have a multiple choice pdf test, this is a no brainer. If you have a multiple choice test with some fill in the blank, you can still use Illuminate, but it won't be as easy. If you want to create a test from scratch on Illuminate...don't.