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Optics

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Holidays on Monday and Wednesday week thirteen led to the reversal of electricity and optics. Electricity has a two day introduction that is more necessary. Optics of reflection and refraction can be done on a cold open laboratory. Set up included water being preloaded on Tuesday to end run the holidays and the possibility of the water being off. The setup song was Sometimes I feel so deserted.  Board was set. Then a brief introduction to total internal reflection and the disappearing coin and beakers  Maicalany positions an object in front of the mirror   Iryann steadies the mirror as Roselihn makes a measurement  Bracey estimates the location of the image in the mirror Ashton indicates the image location while Damien measures the distance behind the mirror. In theory the object distance is equal to the image distance, but a slope of exactly one is almost surprisingly rare.  Tru...

Fruit salad

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This would produce 24 bowls plus roughly two refills. Thirty, the class count this term, would have been a stretch. The pears were halves, not slices, which provided only four halves. Perhaps a non-tropical fruit salad would be a plus in a future term. If all thirty had showed up, the last few would not have had bowls of fruit cocktail to work with.  With 22 bowls filled, this was left. Another suggestion is to drain the juice. The juice is essentially pineapple juice and flavors everything as being pineapple. The cherries were expensive spring 2026 but are probably a worthy addition. 15:45 The procedure built off spring term. Cans were opened at 15:24 with the first arriving student. The first four students got pears. No one else did. Bowls were only filled as students arrived. Although the cans were left up front, no student thought to go up and check the ingredients. The presentation was set to 5 seconds per slide with...

Improving the return rate on student evaluations

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Return rates on student evaluations of instructor, course, and course materials have been low in online courses. The evaluations are anonymous to encourage respondents to respond honestly without fear of retribution. With thanks to a colleague for the following concept, the following is one way to encourage return of evaluations. The concept is to have students submit a screenshot of the evaluation submission confirmation for credit as seen above from summer 2026. The following directions were given for the assignment: Upload a screenshot of the student evaluation response recorded image after completing the evaluation. Just the response recorded image.  After you finish the evaluation, submit the response recorded image so that I will know you completed the evaluation. The evaluation is available at: [link redacted] Course prefix, number, and section: MS 150/O1 Course name: Statistics Instructor last name: Lee Ling Instructor first name: Dana Advance thanks for completing the eval...

Electricity

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This term November holidays drove a change in the order of the laboratories. Lab thirteen Ohm's law was moved up one week and optics was pushed back one week. No renumbering was done. This term also saw new resistor values.  And additional battery holders. The 8:00 session proceeded with groups each using a single multimeter. This was changed to using two multimeters per group and leaving the settings at 20 Volts on one and 200 milliamps on the other. The morning included an addition to the car collection along the fence line. One of the new transistor values. 220 Ohms at 1% 470 Ohms at 1%. Both of the 1% tolerance resistors were beyond 1% away from the color band value, on the order of 2% to 2.5% different. The 11:00 setup minus the batteries. This worked better and meant less dial twirling. At 8:00 there was too much confusion. Not to mention that there was no schematic diagram put up ...