## Witch 107: Infer a Pounding

This has a lot in it: it’s more of a coven than a WitCH. We couldn’t see what else to do. As with our recent PoSWW, this WitCH comes from the Logic and Proof chapter of VicMaths, Nelson’s Specialist Mathematics Year 12 text. This is a new VCE topic, for which the summary from VCAA’s […]

## PoSWW 39: A One-Sided Triangle

As for our most recent WitCH, this one comes from VicMaths, Nelson’s Specialist Mathematics Year 12 text. It is an exercise and solution from the Logic and Proof chapter (covering a new VCE topic).

## Don’t Accept No Subsitutions

As a byproduct of the recent differential equations WitCH, I promised to write something on integration by substitution. I’ve been pondering that, and I will write it, soon. But there’s also a little VCAA story about substitution I’ve been thinking about posting for a long time, and it seems natural to do that first. In […]

## Witch 106: Plane Silly

We’re snowed, and we have a couple posts in the works that simply won’t behave. So, we’ll just keep the ball rolling with a WitCH, and have you commenters do the work for now. The following is the introduction to planes (a new VCE topic) in VicMaths, Nelson’s Specialist Mathematics Year 12 text.

## WitCH 105: Flippin’ Ridiculous

It’s hard to be believe we haven’t already done this one, since it’s been irritating us for years. But in any case it really irritated us again yesterday during a tute, and so here we are. The following introduction and example, chosen largely but not entirely at random, is from Cambridge’s Specialist Mathematics 3 & […]

## WitCH 104: They Cantor Won’t Get it Right

Yesterday, after posting our GAT WitCH, we were contacted by Mysterious Chris. He flagged another set of questions from the same exam:

## WitCH 103: You’re Blocked

The following is a set-up and associated questions on last week’s GAT.

## The Cost of VCAA’s Dissembling

Last month we posted a PoSWW on a 2022 Queensland MCQ exam question, for which the accompanying exam report indicated the wrong answer. It is depressingly unclear why QCAA had not been previously alerted to the error, but a couple weeks after our PoSWW appeared, QCAA updated their exam report: in the amended report QCAA […]

## VCAA’s Greater Literary Offenses

The difficulty of critiquing VCAA mathematics exams is capturing the variety and the frequency and the depth of the flaws, and then summing the overall effect, the fundamentally impoverished approach to mathematics and its testing. Documenting straight out errors is not overly difficult, and even non sequitur questions are manageable: the error or weirdness typically […]

## What Are the Proper Uses of “Technology” in the School Mathematics Classroom?

Yes, the “if any” is implicit. Unlike our recent Who Should People Read post, this one is not intended to produce a list of “useful resources”. Rather, akin to this post, it is a challenge to come up with anything. But first, a story.