An exploration of my student resources - such as the teacher, textbook, and internet - unearthed the proof, which involves…
An exploration of my student resources, such as the teacher, textbook, and internet, unearthed the proof, which involves…
I know that dashes are usually used for emphasis. I’m not trying to emphasize that portion of the sentence, but all the commas in the second version look very clumsy to me. I thought about perhaps getting rid of one of “teacher, textbook, and internet” so that I would not have to use commas, but I feel that they are all different, and I would like to mention them.