DavidButlerUofA's user avatar
DavidButlerUofA's user avatar
DavidButlerUofA's user avatar
DavidButlerUofA
  • Member for 9 years, 9 months
  • Last seen this week
  • Adelaide, Australia
86 votes
Accepted

Why are induction proofs so challenging for students?

60 votes
Accepted

What is a good method for drawing a Möbius band on the blackboard?

31 votes
Accepted

Good way to explain why an absolute value in an equation does not automatically mean to make the other side +/-

25 votes

Probability Misconception: Two Bags with Black and White Marbles

24 votes

How does one explain that transformations 'inside' a function operate in the opposite direction than intuition suggests?

21 votes
Accepted

The definition of natural log and e

21 votes
Accepted

How can I convince someone to use a calculator and not worry about the mechanics too much?

19 votes
Accepted

When $-x$ is positive

17 votes

What good is the phrase "Taylor series"?

16 votes

What is the rationale for the absent (+) in mixed fractions?

16 votes
Accepted

Helping a student exasperated by abstract concepts in linear algebra

15 votes
Accepted

Why are hyperbolic functions given "short shrift" at "low" levels of math?

15 votes

What is an efficient way of drawing surfaces in multivariable calculus?

14 votes

Surprising examples of Cavalieri's principle

13 votes

What could be good non-mathematical analogies to explain the difference between the words theorem, proposition, lemma and corollaries?

13 votes

Where can I find realistic data for college-level elementary statistics problems?

13 votes

Pedagogical quandary with the definition of $i$

12 votes

how is volume different than capacity

12 votes

Wonder as motivation

12 votes
Accepted

Explaining mathematics, giving talks, and using the blackboard as a support

11 votes

Substituting $x=1$ into $px^{p-1}$, why do so many students get $p^{p-1}$?

11 votes
Accepted

Open-ended tasks for teaching students about integration techniques

11 votes

Correct pronunciation of 'xth' (and workarounds for those who find it a tongue-twister)

10 votes

How do you explain why perpendicular lines have negative reciprocated slopes?

10 votes

The sum - product problem

10 votes

Systems of linear equations in grade 3?

10 votes

Any tips in explaining the central limit theorem in statistics?

10 votes
Accepted

A formula for the area of a rectangle

9 votes

How should students say in words the notation for a limit?

9 votes

A basic game to make arguments about