Concerns regarding safety, the accurate use and calibration of equipment need to be taken into account in every lab that you do. Here are some ideas to get you thinking about how to include these issues in the labs that you plan and do.
How do you get across the principles of safety?
List of safety issues
What's with this picture?
How do you check accuracy?
a. Have a measuring practical at the beginning of the course, and monitor student procedures.
b. Pool data from different groups
c. Repeat experiments if possible, or have duplicates
d. Use different techniques to obtain the same results (e.g. measuring pH in several different ways)
e. Choose the right tools for the job – e.g. choose the right pipette or graduated cylinder for the range of accuracy required.
a. Monitor student participation.
b. Assign each student a task (e.g. data recorder, pipettor, reader--student who will read the instructions, etc).
c. Have students turn in individual lab reports which emphasize the discussion section, to ensure that students understand the concepts.
d. Occasionally, have students grade the work of each other.
e. Students must present a prelab assignment to teacher before entering classroom.
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