If you didn’t know that STEM in educational jargon is an acronym for “science, technology, engineering and math,” Georgia Southern University’s fall graduation services, especially the one at midday, were a good time to learn. The university awarded degrees to 1,707 students Friday in ceremonies at 9 and 11 a.m. and 1 p.m. in Hanner Fieldhouse. Col. Thomas J. Tickner, the commander for the Savannah District, U.S. Army Corps of Engineers, gave the 11 a.m. commencement address for the Colleges of Science and Mathematics, Engineering and Information Technology, and Health and Human Sciences.