Classroom Resources

Don't be afraid of bullies. Get together to deal with them.

Here's one story that Meena wishes the learners to know, remember and act if they face bullying.

Here's a video of the same.

 

2,500 years ago, the writing of history as we know it didn’t exist. The past was recorded as a list of events, with little explanation for their causes beyond accepting things as the will of the gods. Herodotus wanted a deeper understanding, so he took a new approach: looking at events from both sides to understand the reasons for them. Mark Robinson explains how “history” came into being.

Challenge your learners to retire their colour pencils and paint brushes for a day and ask them to express themselves only through their thumbs. Let the fun begin!

Meet the different wild cats of India in our latest #PhoneStory Wild Cat! Wild Cat!

Fagnano’s Problem: In 1775, Giovanni Fagnano posed and solved the problem - “For a given acute angled triangle, determine the inscribed triangle of minimum perimeter.” Using calculus, Fagnano showed the solution to be the Orthic Triangle – a triangle formed by the feet of the three altitudes. A different proof was given in At Right Angles, Vol. 6, No.

The approximation of π is a popular pastime of students of mathematics and I have started with the familiar age-old way, of fitting a regular polygon tightly in a circle of radius r. The vertices of the n-sided polygon are joined to the centre of the circle so that the angle subtended at the centre by each segment is 360/n. If n is sufficiently large, the perimeter of the polygon approaches the circumference 2πr of the circle and this approximation improves as the number of segments increases.

Elsewhere in this issue, two students report on their search for Happy Numbers. This is an interesting topic in recreational mathematics which throws up questions that are not easy to answer. We describe the essential proof techniques used in the study of such topics

This time in Student's Corner, we atlk about happy numbers.

In this short note we start with a simple problem concerning a triangle and then analyze new problems derived from it by changing the hypothesis.

This short article narrates a real-life classroom episode: a situation where two different answers were obtained to a counting problem and the class was nonplussed for a while. Ultimately, good sense prevailed and we were able to discover the error.

The problem studied was this:

Eight tennis players wish to split up into four pairs to play four singles games. In how many ways can they do this?

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