Månadens problem, mars 2021

Du kan ladda ner alla problemen som en pdf. Alla_problem_mars_21 Vi publicerar lösningar och kommentarer i mitten av april 2021! Skicka in lösningar Vi utmanar alla enskilda, grupper och klasser att skicka in lösningar, kommentarer eller förklaringar till hur ni löst problemen. Bidragen kan vara digitala eller på papper. Inkomna lösningar publiceras ibland och kan […]

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“In the mind’s eye, a fractal is a way of seeing infinity.”

In a testament to Aldous Huxley’s astute insight that all great truths are obvious truths but not all obvious truths are great truths, the polymathic mathematician Benoit Mandelbrot (November 20, 1924–October 14, 2010) observed in his most famous and most quietly radical sentence that clouds are not spheres, mountains are not cones, coastlines are not

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What great teachers do differently: nineteen things that matter most

Effective educators know that the act of teaching involves careful consideration of what propels student learning and what can deter it. The classroom represents a positive learning context built through intentional educator decisions and moves to satisfy the students’, the school’s, and society’s purposes (Norris, 2008). The third edition of What Great Teachers Do Differently:

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Effective programs in elementary mathematics: A meta-analysis

This article reviews research on the achievement outcomes of elementary mathematics programs; 87 rigorous experimental studies evaluated 66 programs in grades K–5. Programs were organized in six categories. Particularly positive outcomes were found for tutoring programs (effect size [ES] = +0.20, k = 22). Positive outcomes were also seen in studies focused on professional development

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