“…Its around-the-clock accessibility extends discussions beyond classrooms, and it allows one-to-one, one-to-many, and manyto-many interactions. Compared with spontaneous and transitory face-to-face class discussions, online discussions are text-based and more structured, providing students time to formulate thinking and compose postings, thus helping to promote student higher order learning [22,8,23,24,25]. The textbased feature of online discussions makes student thinking visible and leaves a permanent written record for student later review.…”