## So you need a recommendation letter

Dear student, let me explain why I did not write a recommendation letter for you — and how to increase the probability that I agree to write it next time you ask.

Dear student, let me explain why I did not write a recommendation letter for you — and how to increase the probability that I agree to write it next time you ask.

Some students are able to reason properly, and apply the right formula, then fail on the last (and simplest) step: calculating the result. So I wrote a short handout explaining how to calculate properly with an electronic calculator or a spreadsheet.

How to use arbitrary complex calculations in Moodle “calculated” questions to generate similar questions with different sets of variables.