https://plp.psu.edu/course-duration/under-30-minutes/ 2026-06-22T14:58:25+00:00 https://plp.psu.edu/course-duration/31-60-minutes/ 2026-05-26T16:30:07+00:00 https://plp.psu.edu/course-duration/1-hours/ 2026-06-29T13:46:44+00:00