Day 66: Test Corrections

Thursday, 13 November 2014

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The question. I asked student to solve for magnification.

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Here’s the correction for the above problem. She solved for the focal length incorrectly at the start of the problem but all other work was correct.

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This kid mostly got the correction right — they did indeed forget a negative sign. I felt it was¬†bit too¬†nitpicky of me to say that the “decimal in the wrong spot” is really a unit conversion problem.

Examples of good test corrections. I recommend building in about 20% of the test time to dedicate to corrections. That is, I build tests that should take 50 minutes plus 10 minutes of corrections.

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Day 65: Darkroom

Wednesday, November 12 2014

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We went to the darkroom today in one class and took a test in the other two. Above are a few cameras and dark cloth that were left behind. Darkroom days are so hectic I forgot to take any other pictures.