This dissertation will examine the efficacy of peer-led team learning (PLTL) in a humanities and social sciences program, at a midsize Texas university. It will be conducted exclusively within the College of Humanities and Social Sciences (CHSS), and the academic subjects to be evaluated include English, history, and philosophy. Its primary function is to disclose whether or not PLTL facilitates in student participants improvement in critical thinking skill acquisition and deeper process content knowledge. Of primary interest in this qualitative, narrative case study is deducing how breakout sessions – supplementary meetings led by student participants, in the absence of instructors, designed to enhance classroom instruction – aid in concept synthesis and retention. Of equal importance is evaluating how the implementation of a PLTL instructional framework cultivates in its participants the acuity necessary to demonstrate that positive learning outcomes are occurring, or have the potential to occur; thereafter, collected data, in the form of participant and instructor narratives derived from questionnaires, interviews, researcher observations, writing samples, and essay-based examinations will support or refute whether improvement in critical thinking skill acquisition and deeper process content knowledge is evident in student participants. Keywords: Peer-led Team Learning (PLTL), Critical Thinking Skill Acquisition, Deeper Process Content Knowledge, Positive Learning Outcomes, Humanities and Social Sciences, Qualitative, Narrative, Case Study

Indiana University-Purdue University Indianapolis (IUPUI) / The cyber Peer-Led Team Learning (cPLTL) workshops are a synchronous online adaptation of the educational intervention PLTL, in which students, under the guidance of undergraduate peer facilitators, collaboratively solve problems in small groups. The purpose of this parallel convergent mixed methods study was to assess the impact of implementing cPLTL in an organic chemistry course on students’ workshop experiences, performance, and development of curved-arrow formalism skills. Statistical analyses revealed comparable attendance rates, distribution of course grades, and achievement on American Chemical Society First-semester Organic Chemistry Exams. However, plotting workshop grades by AB, C, and DFW grade groupings revealed that PLTL students earned more successful grades than their cPLTL counterparts (91% vs 77% ABC grades). Utilization of a new curved-arrow formalism analytic framework for coding student interview artifacts revealed that cPLTL students were statistically less likely to successfully draw the product suggested by the curved-arrows than their PLTL classmates. Both PLTL and cPLTL students exhibited a comparable incidence of relational to instrumental learning approaches. Similarly, both PLTL and cPLTL students were more likely to exhibit a common Scheme for Problem-Solving in Organic Chemistry (SPOC) than having dialogue that could be characterized by Toulmin’s Argumentation scheme. Lastly, implications for faculty are suggested, including: developing more explicit connections concept, mode, and reasoning components of understanding curved-arrow formalism for organic chemistry students; optimizing graphical collaborative learning activities for online learners; and developing online students’ sense of community.