This database of online university course syllabi was released in early 2017, with over 1 million syllabi from US universities; the project intends to expand with UK, Canadian, and Australian syllabi. The database was manually queried for several hundred authors of prominent SF/F works, with results shown below for all titles with counts of 20 or more.
Some results are peculiar, with well-known titles displaying smaller counts than lesser-known ones; e.g. Ender's Game with 16, American Gods with 8, and Hitchhiker's Guide to the Galaxy with 13 fall below the 20 count cutoff, while Slaughterhouse Five apparently has no count at all. And many prominent SF/F authors have no titles meeting the 20 count cutoff.