Dr. Garrison is teaching Upper School mathematics at Summit. He holds a Ph.D. in Mathematics Education from Georgia State University, and a BSME (Mechanical Engineering) from Purdue University. He has almost 40 years of teaching experience at the middle school, high school, and university levels.

Dr. Garrison and his wife of 43 years live in Kirkland, but they travel frequently to be with their three married children and seven grandchildren.

He enjoys partnering with Summit students in their Christian walk as they explore God's mathematically ordered universe. He is thrilled to be part of the staff at Summit and considers it his favorite teaching assignment ever!