Natural Blogarithms

Is there a clinical diagnosis for depression resulting from grading algebra exams?  There should be.  Over the course of the last few days I finished grading all of my algebra exams that I gave last week.  I have to say that I am utterly disappointed by some of the results.  It really has been one [...]

Here is a link I recently added to my bookmarks:
How to write proofsA 12-part tutorial on proof writing. Includes direct proof, proof by
contradiction, proof by contrapositive, mathematical induction, if and
only if, and proof strategies.
HT:  Homeschool Math Blog