Sunday, August 30, 2015

Insane things I hope to avoid this year: Micromanaging microscopes

In America, many high school biology students go through the ritual of memorizing the parts of a tool they will then use to analyze a newsprint letter "e" under various powers and positions, only to put the tool away for the rest of the year their lives

This ritual can go of for days, as students struggle to make sense of this new tool, of the requisite worksheet asking deep questions like "Which way does the 'e' move?" and a teacher seemingly obsessed with a particular letter of the alphabet.
 (You can even buy a letter e slide, preserved using
"state-of-the-art preservation techniques."

This is often followed up by having students look at preserved (and very dead) specimens of critters they never knew, except for that kid in the corner who chewed on his chapped lips enough to surreptitiously look at his own blood.

Mark my words--a student struggling with focusing a scope will get excited by an air bubble, then get his own bubble deflated as he hears "that's just a bubble," followed by criticism for improperly mounting his specimen. (Talking about "mounting specimens" with sophomores has its own entertainment value, right up there with talking about the blue nitrogen atoms in your 3D molecule model set.)
Live slug from my backyard more interesting than letter "e"

Heck, if a child gets excited by the beauty of a bubble in his microscope, share the excitement! It's a step in the right direction. Then let your students play. Get some pond water, a dead ant, a piece of hair, floor dust, anything but some assigned slide a child has little interest in, and let them play.

Give your students permission to use the scopes whenever they have a reason to use one, which, in biology class, can be pretty much every day! Encourage your students to look at everyday objects they choose to look at.

They will very quickly learn the limits of the tool.

Otherwise you're wasting everybody's time--no need to know how to use a hammer if you live in a world that has no nails.

If your microscope lamps are not burning out now and again, you're not using them enough.

1 comment:

Anonymous said...

Well said!