Methods of Last Resort 5: Median and Mean. | Peter Mattock

Lets see if these seem familiar:

Median = middle number in a data set when the set is ordered.
Mean = total of the data set shared equally between the number of data points (or possibly “add them all up and divide by how many there are”, but if you still use this, then see my blog here).

In the main, perfectly acceptable approaches to finding median and mean. Note I don’t use the term average here: I think a lot more work needs to be done to separate the finding of mode, median and mean with the concept of average, and will blog about that at some future point. For now I want to concentrate…

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Classroom Management #1 | fractionfanatic

Often there is a pair of rose-tinted glasses on my blogs about awesome lessons and amazing students. While there are great things going on in my classroom there are also periods, classes, days, weeks etc where I am faced with behaviour issues that impact on learning.

I would like to regularly share stories about difficult situations I have faced in my classroom (or corridor) to paint the realistic view of my teaching life. Some of these stories will have happened as recently as last week or as long ago as I can remember. All the names have been changed. 

So here’s story number 1 – Bread….

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Lego QR Code v2.0 | Mr. P. Collins

A while back I blogged about my Lego QR Code here.

The QR code has very much, up until today, remained at the side of my classroom(s) kind of propped up against something as I never found a reliable way to put it up on display. I once tried to blue tack the Lego board/code to the wall, but inevitably it fell off and I had to create the code all over again from the scattered pieces of Lego!

Earlier this year I discovered Nimuno Loops! I saw a Twitter/Facebook post advertising their ‘Lego tape’ and decided to ‘back’ them. My Nimuno Loops tapes got delivered earlier this month and so it was…

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The science of school uniform | Greg Ashman

Back in the mid 1990s, the U.K. was in the grip of a crisis caused by the emergence of Bovine Spongiform Encephalopathy (BSE). This was a fatal brain condition affecting cattle that became colloquially known as ‘mad cow disease’. People were concerned because it seemed as if cows had acquired the illness by eating sources … Continue reading The science of school uniform

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Collecting coupons | Colin

For all the grief I give @reflectivemaths on Wrong, But Useful, he does occasionally ask an interesting question.

In episode 45, he wondered how many packs of Lego cards one would need to acquire, on average, to complete the set of 140?1
A simpler case

Suppose, instead of 140 cards, there was a total of three to collect.

You start (obviously) with no cards. On average, you need to pick up a single card to make sure you have one card in your collection. By on average, I mean ‘every time’. The expected time (in cards) to go from 0 cards to 1 card is 1.

If you have one card, how long…

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How to teach (the ‘disadvantaged’…) | (mrtaylor)

I saw an article on The Times via Twitter the other day/week (I’ve lost track of time!) titled “Disadvantaged pupils fall behind despite funding”. My initial response was ‘You mean, there’s a problem that can’t be solved by just throwing money at it, and your response is that the funding is the issue?!’. My more thoughtful response was ‘The issues that disadvantaged pupils suffer are not due to their schooling, but down to society. The (approximate) 14% of their time they spend in schools is not the deciding factor on their disadvantage and throwing money at that time in schools won’t change…

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