Teacher development

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An easy construction for the Harmonic MeanArticle | By At Right Angles | Apr 04, 2018  | Mathematics | 0 Likes

We are given two positive numbers a and b. We wish to show how to construct a length corresponding to the harmonic mean of a and b...

Misconceptions in FractionsArticle | By At Right Angles | Apr 04, 2018  | Mathematics | 0 Likes

One of the most abstract concepts introduced in primary classes is Fractions.

The Conjoining Error in School AlgebraArticle | By At Right Angles | Apr 04, 2018  | Mathematics | 0 Likes

This article briefly discusses a particular error in algebra that is quite common and the possible reasons for this error.

The Conjecturing ClassroomArticle | By At Right Angles | Apr 03, 2018  | Mathematics | 0 Likes

I first came across the idea of a conjecturing classroom during my teacher training (PGCE) in the UK.

The Power TriangleArticle | By At Right Angles | Apr 03, 2018  | Mathematics | 0 Likes

In the companion article by Prof V G Ti

Stirling Set Numbers and Powers of IntegersArticle | By At Right Angles | Apr 03, 2018  | Mathematics | 0 Likes

This article introduces a remarkable class of combinatorial numbers, the Stirling set numbers. They are also known as Stirling numbers of the second kind.

On the sums of powers of natural numbers - Part 2Article | By At Right Angles | Apr 03, 2018  | Mathematics | 0 Likes

In Part II of the article, we present a unified approach by which the formula for the sum of the k-th powers of the first n natural numbers can be obtained, for positi

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