Continuous Everywhere but Differentiable Nowhere

I started this post a long time ago (maybe two or three months ago), but scrapped it. But I’ve decided to finish it up and make a little plea for advice at the end.
What do you do when you ask a question and get a totally wrong answer? Okay, this question screams newbie, but it happens [...]

I’ve been meaning to put a blogroll up for a while. But the problem is that my blogroll is constantly evolving, and I wanted something that updates as I update. 
Well, my RSS reader netvibes — which I’ll tout as currently the Best. Thing. Ever. — allows you to see all the blogs I read, updated. [...]

Okay, so here’s a story I somehow missed from a few months ago. A lecturer of writing at Dartmouth created quite a stir with a threat (then removed, then reinstated) of suing her students and some colleagues. Why? Discrimination. (Honestly, though, who knows of what kind. Even after reading everything, I’m at a loss.)
There have [...]

You should head over to the Carnival of Mathematics online. It’s the one. (I had to do that… I started teaching probability to my seventh graders and we reviewed factorial today.) 
I starts out with a super interesting fact about the number 33 that I had never heard before, so for that one tidbit alone, [...]

I was never them. I can’t relate.
I was looking online for something related to my school, and I came across a LiveJournal by a student (from my school way before I came). He writes sporadically about his senior year (sometimes writing from class)!
Some things he says:

I just did absolutely awful on my bio test and I [...]

An intuition question. 
Look at the function below. It may surprise you that it is a constant! For any value of , the function will have the same value. I’m wondering, now that you know this, if you can get a sense of why it would be a constant, without (a) using your graphing calculator, [...]

Each year, my school provides each teacher with $100 of “professional development” money. I don’t know exactly why they call it that (hence the quotation marks). For things like conferences, online courses, etc., we have a really great fund to tap into. No one I have talked to has ever been denied money from that [...]

I had the end game in sight. I carefully planned out all my Algebra II classes so that we could learn the very basics of matrices and systems of equations, and have one last quiz on them, before the school’s official “review days” kick in. (No assessments during those days.)
Everything was peachy keen. 
Until I learned [...]

The year is coming to a close and I’ve found something to entertain my seniors. They’re taking regular calculus. More than likely, most of them will never take a math class again. If they are going to take math in college, chances are they’re going to be taking calculus over again (I don’t teach the [...]

The 6th Monday Math Madness is online now. This week is actually not so hard, even though there are two different problems… I was able to get both of the answers in about 30 minutes (assuming I didn’t make any huge errors). I especially like the first question, because it can be easily transposed into [...]