MathTeacher
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 Jan 19 awarded Yearling Dec 10 awarded Notable Question Oct 5 awarded Good Question Feb 11 awarded Popular Question Dec 22 comment Should a high school introductory calculus class teach $\varepsilon$-$\delta$ proofs? Yeah, why don't we teach infinitesimals in beg. calculus, now that we have non-standard analysis? Dec 22 answered Should a high school introductory calculus class teach $\varepsilon$-$\delta$ proofs? Dec 22 answered proof of chain rule Sep 24 awarded Autobiographer Jul 2 awarded Curious Apr 13 awarded Notable Question Mar 24 awarded Popular Question Mar 11 comment Is there a name to refers to anything that is a point, line, plane, etc? Sorry, I missed the "necessarily" part of Loki's answer. Mar 11 comment Is there a name to refers to anything that is a point, line, plane, etc? Ok, but what if they do. In high school language. Mar 11 asked Is there a name to refers to anything that is a point, line, plane, etc? Dec 11 awarded Yearling Dec 8 comment What is a good example to show high school students why a proof for induction is a reasonable kind of proof? I like the subset idea. Dec 8 comment What is a good example to show high school students why a proof for induction is a reasonable kind of proof? Yeah but is showing it via induction really the most intuitive way of showing it? At least for me it is not. Dec 8 comment What is a good example to show high school students why a proof for induction is a reasonable kind of proof? @John: example 3 was just the sort of thing I was looking for. Can you think of others at about that level? Dec 5 comment Why is $\frac{1}{\frac{1}{X}}=X$? Here's another way I look at it: say $x=2$. $1\div\frac{1}{2}$ asks How many one halves fit inside one?" Well, two one halves fit inside one. Dec 5 comment What is a good example to show high school students why a proof for induction is a reasonable kind of proof? And I'm going to avoid visual. Many of my students are not comfortable with visual things.