Herbert Thal teaches Middle and Upper School Projects at Grayson. Mr. Thal earned a B.S. in Mining Engineering from The Pennsylvania State University, and his M.Ed. from Temple University. After teaching in the Philadelphia region, Mr. Thal has spent most of his career teaching in Botswana at Maru-a-Pula School, a co-educational, independent day & boarding secondary school with a reputation as one of Africa’s premier academic institutions.