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 Tally Marks and Roman Numerals
 General Purpose and Special Purpose Tools
 Notes on Representation  Tally Marks
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 Math in the Comics  part 1
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 Notes on Representation  Tally Marks Ho!

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Tag Archives: sorting
In the Middle – Median
In the previous post, I reported on 7th graders exploring the notion of the middle between two numbers. The method used by almost all seventh graders is one I dubbed the “twohanded approach.” The same approach also works very well … Continue reading
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Tagged denominations, extending patterns, invariants, math class, representational proof, reverse engineering, sorting, unlearning
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Math in the Comics – part 8
Today’s Rose is Rose comic strip reveals something that’s in the cultural background about math homework: Can you name the background assumptions this comic strip makes, things that do not need to be stated explicitly for a wide audience to … Continue reading
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Tagged gauntlet, math class, math in the comics, selection, sorting
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Notes on Lookup – Histograms as Sieves
I think I overlooked one interesting example of something like a sieve being used in the typical K12 math curriculum, and this post is intended to remedy that. It is possible and instructive to look at a histogram as a … Continue reading
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Tagged denominations, lookup, math class, models, representations, sieve, sorting
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Selection versus Education
In many walks of life, we are quite used to systems that select suitable candidates by putting a graded series of hurdles in their path. In the USA we do this with presidential candidates: we make them campaign on the … Continue reading
Posted in Uncategorized
Tagged education, graded hurdles, math class, selection, sorting
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