PEDAGOGICAL DESIGN
The cooperative learning activities were designed based on a
modification of the jigsaw approach, in which small groups of
students work individually on components of a larger topic or
problem and then later synthesize their collective knowledge.48
This approach requires individual responsibility while also
promoting group understanding of a larger topic. In a typical
activity, each student was tasked with analyzing a small feature
of a spectrum (Table 1), such as a peak in a 1H NMR spectrum,
using their interpretation to contribute to an overall group
assessment of the posted spectrum leading to elucidation of the
molecular structure (Figure 1). The approach allows for
accessible tasks, while still providing a complex learning
environment without overwhelming the students.49
The jigsaw activities were implemented in three sections (N
= 48 students) of a second-semester organic chemistry lab
course. Nonparticipating students (N= 303) were assigned
comparable work to do individually. The participating sections
were selected based on the graduate student teaching assistants
who were assigned to teach them and IRB approval was
obtained for the comparative study. Within each section, small
self-organized groups of 4−6 students worked together to solve
a new spectroscopy problem each week. The problems were
constructed to parallel the course syllabus and increased in
difficulty as the term progressed; the problems ranged from
simple IR and NMR spectra to complex problems involving
multiple sources of information in addition to a spectrum, such
as partial IR and 13C NMR data or reaction information.
Students were also prompted to read each others’ posts and
offered critiques, alternate viewpoints, problem solving advice,
or additional reasoning in support of a previously posted
PEDAGOGICAL DESIGNThe cooperative learning activities were designed based on amodification of the jigsaw approach, in which small groups ofstudents work individually on components of a larger topic orproblem and then later synthesize their collective knowledge.48This approach requires individual responsibility while alsopromoting group understanding of a larger topic. In a typicalactivity, each student was tasked with analyzing a small featureof a spectrum (Table 1), such as a peak in a 1H NMR spectrum,using their interpretation to contribute to an overall groupassessment of the posted spectrum leading to elucidation of themolecular structure (Figure 1). The approach allows foraccessible tasks, while still providing a complex learningenvironment without overwhelming the students.49The jigsaw activities were implemented in three sections (N= 48 students) of a second-semester organic chemistry labcourse. Nonparticipating students (N= 303) were assignedcomparable work to do individually. The participating sectionswere selected based on the graduate student teaching assistantswho were assigned to teach them and IRB approval wasobtained for the comparative study. Within each section, smallself-organized groups of 4−6 students worked together to solvea new spectroscopy problem each week. The problems wereconstructed to parallel the course syllabus and increased indifficulty as the term progressed; the problems ranged fromsimple IR and NMR spectra to complex problems involvingmultiple sources of information in addition to a spectrum, suchas partial IR and 13C NMR data or reaction information.Students were also prompted to read each others’ posts andoffered critiques, alternate viewpoints, problem solving advice,or additional reasoning in support of a previously posted
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