explanation

The right textbook

Too big, too slow, too sparse?

We describe a problem that you probably don’t have.

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The photographer’s intention

Photographs and images

Technology can make images much more expressive and creative than even a decade or two ago.  Mostly, it hasn’t.

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Getting the stars right

Does it matter?

We wonder how careful a fiction author really needs to be.

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Octopus arithmetic

How different could it get?

We ponder how to communicate with aliens.

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Language change

The long and short of it

We ponder an old textbook.

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Responsibility

The passive voice

Sometimes it’s hard to work out who is responsible.  It’s only going to get harder.

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Too simple, or not simple enough

Modeling stars

How do you know when you’ve included all the important things?

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Cyborg students

Mechanical aids

When we test students today, what do we test?

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Microclimates

Weather and learning

If you look closely, there is enormous diversity.  This can be a problem.

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What it looks like

The craters of the Moon

It looks like something familiar. . .

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