Searching for audiobooks on teaching or education is easy. Start at the library catalog, GIL-Find.
Enter a search term in the search box (I just used "teaching" in this example). Below the search box, change the drop-down menu "anywhere in the record" to "in subject." This will give you books about teaching rather than books that have the word "teaching" anywhere in their description, and narrow your results down to more relevant items.
Now that you have some results, narrow them down to just audiobooks. In the left column, look for the "Format" header. Click show more and then select Audio as your format as in the screenshot below.
You'll get a variety of online and physical books. If you need online books only, click Full Access Online under Availability.