**5** My conceptual classes are learning how to determine the slope of a best-fit line and then write an equation with appropriate variables. We’ll be adding units and graph titles tomorrow. I have some linear data that I give them to practice with. This data is prefaced with a little story about an FBI agent measuring her banana tree every month. It grows pretty fast!

My AP classes are learning to use Excel to calculate uncertainties in measurements and then use the uncertainties for error bars on the graph. They also have to use the LINEST function to determine uncertainty in the slope and y-intercept. This student has just learned something that doesn’t work, a very valuable lesson!

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