Iterative Schemes and Quake 3

Whilst taking a break from a bit of lesson planning (yes, I do plan!) for iterative schemes with my advanced higher maths class, I clicked on SumbleUpon and up came
Quake 3’s Fast Inverse Square Root Function.  Most serendipitous!

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[audio:childrens-tv.mp3]

[audio:first-day-of-spring.mp3]

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