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Instructional Methods and Strategies
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p>The activity places the lab investigation before the reading
in order to provide students with some experience so the reading
has more meaning. (Activity Before Content)
During the lab investigation, students manipulate equipment,
record observations in pictures and words, and have the
opportunity to suggest changes to the method provided.
Bybee's 5E model can be used: Engage the students by
introducing the problem of knowing before actually mining the
rock if there is silver and gold in it and, if so, how much.
Students Explore some of the processes involved in fire assay
using the model of collecting clay particles suspended in water
with a gelatinous precipitate. Students Explain the reading
selection through reference to their lab investigation. Students
Elaborate on the lab investigation through the reading selection
and through the evaluation of the fire assay method for
introduced errors. Students Evaluate through the listing of the
steps of fire assay and considering introduced errors.
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Instructional Methods and Strategies
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