1. Effects of Peer-Challenge Support on Learning During On-Line Small Group Discussion Open Access Author: Choi, Ikseon Title: Effects of Peer-Challenge Support on Learning During On-Line Small Group Discussion Graduate Program: Instructional Systems Keywords: turfgrass management educationonline peer learningonline peer questioning strategiesonline discussion strategiesonline collaborative learning File: Download thesis.pdf Committee Members: Francis M Dwyer Jr., Committee MemberSusan M Land, Committee Chair/Co-ChairAlfred J Turgeon, Committee MemberRichard Alan Carlson, Committee Member