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In my 11th-12th grade physics classes, I first have my students use the 60Hz
recording timers (with carbon paper circles and paper tape) to study motion.
After we have been through that process, I feel comfortable having them use
Vernier motion sensors because we can relate what the sensors are doing for
us back to the things we did with the paper tape.
In my 9th grade, low-skills physical science classes, we use the motion
sensors with just a brief explanation of how they work (one that I believe
most students do not care about or understand). I know I'll draw ire (and
fire) from some, but I defend my practice because I am more interested in
the students' ability to "see" the motion represented by distance and
velocity graph than in their understanding of how the data are collected.
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