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For questions related to teaching mathematics. For questions in Mathematics Education as a scientific discipline there is also the tag mathematics-education. Note you may also ask your question on http://matheducators.stackexchange.com/.

6 votes
0 answers
283 views

Interesting things you learned while grading/marking? [closed]

What are some interesting mathematical things you have learned while grading (or marking, if you prefer) student work? For example, clever proofs that students came up with; nice counterexamples or in …
6 votes

Zorn's lemma: old friend or historical relic?

Here's another example, from a rather worm's-eye view. (Apologies for too many edits.) Theorem: Let $R$ be a non-zero commutative ring with $1$. Then there exists a minimal prime ideal in $R$, i.e., a …
Zach Teitler's user avatar
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3 votes
Accepted

How to find eigenvalues following Axler?

Using minimality can help. Without using the polynomial-root oracle you can find the minimal polynomial of $T$ by looking for the first linear dependence among $I, T, T^2, \dotsc, T^r$ (for the minim …
Zach Teitler's user avatar
  • 6,237
2 votes

Big ideas and big ways of thinking in statistics?

The American Statistical Association has resources for statistics education, available here: http://www.amstat.org/asa/education/home.aspx ...including, in particular, resources for undergraduate ed …
Zach Teitler's user avatar
  • 6,237