Class 9-10

These videos are produced by TESS-India to support school leaders in enhancing the quality of teaching and learning in their primary or secondary school. We are sharing the 2nd part of the series.

Today is Charlie Chaplin's birthday. He made you smile by being silent through out his illustrious career. But then, in 1940 he made 'The Great Dictator' where he spoke only once. Not a homily. But that which trancends region, religion, language, caste, creed & colour. A voice of conscience which was pained at the happenings of that era. We are including Melody Sheep version of the speech which remixed the images from the contemporary happenings. Relevant as ever.

There is more to the story that right part of the brain is responsible for all things artistic & left part for logic. Neuroscience has come a long way from this fixation. With the advent of MRI (Magnetic Resonance Imaging) & later fMRI (functional MRI), we could unravel some of the deepest mystries of the functioning of the brain. In this video clip, Minute Earth makes it school classroom friendly with his illustrated humour.

In this episode of "How To Prove It", we discuss some more applications of Ptolemy's theorem.

This article is the first in a series dealing with inequalities. We shall show that in the world of algebra as well as the worlds of geometry and trigonometry, there are numerous inequalities of interest which can be proved in ways that are easy as well as instructive.

Expose your learners to 'degenerate' triangles.

These are excellent GeoGebra exercises for students helping them to develop and practise skills of visualisation, logical sequencing, making connections and recalling theory. Read on.

Mathematical investigations are perfect for Low Floor High Ceiling activities. Here, we have described how a simple pattern can be recognized, investigated, played with and generalized. If your students have enjoyed DADS Rule, do let them try the same strategies with other number patterns; we hope they rule!

A Kepler triangle is a right-angled triangle whose sides are in Geometric Progression, which requires that its sides are in the ratio 1 : φ : φ where  φ = ( 1 + 5 )/ 2 is the Golden Ratio. Here is an unexpected demonstration of the Golden Ratio.

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