A prototype multimedia
program, Multimedia and Mental Models in Chemistry (4M:CHEM), was
developed to facilitate student learning in the classroom. 4M:CHEM
utilizes a computer split-screen design to show simultaneous videos
of real experiments, molecular-level animations of these experiments,
real time graphs of macroscopic properties or structural diagrams,
and chemical equations. These four windows can be shown individually
or in any combination. When multiple windows are activated, actions
in each are synchronized. These synchronized views of chemical phenomena
may be paused and restarted in order to aid discussions of connections
between and limitations of macroscopic, microscopic, and symbolic
representations. The prototype program involves 32 experiments dealing
with physical, gaseous, solution, and heterogeneous equilibria. Both
qualitative and quantitative experiments are included to assist students
in building chemical understanding and intuition as well as enhancing
their quantitative problem solving abilities. An initial assessment
of 4M:CHEM in two lecture sections for two one-hour presentations
showed an increase in students' understanding of characteristics
of systems at equilibrium and a marked decrease in misconceptions
of chemical equilibrium.