Top Posts
 Notes on Representation  The Number Line
 Operators, Functions, and Properties  part 42
 Running the Math Gauntlet
 Making Change  A Sam Lloyd puzzle
 Notes on Deferred Computation  the Pythagorean Spiral
 Notes on Fractions
 Operators, Functions, and Properties  part 35
 Operators, Functions, and Properties  part 38

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 Mathematical Notations and Schools – 15
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 Mathematical Notation and Schools – 2
 Mathematical Notation and Schools: The Series
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Monthly Archives: May 2009
Notes on Operations – Unary Minus
“Unary minus” is the name for the symbol in , which looks like a minus, but isn’t a subtraction of two quantities. This simplelooking thing is associated with lots of confusion in middle school math. We’re all familiar with “” … Continue reading
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Tagged denominations, extending patterns, models, naming, representations
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Problems in Algebra – part 2
In this series on common mistakes made by students in middle school mathematics, let’s look at this one: Problem: Simplify Jessica’s response: . We can agree that this is wrong, and we can probably tell the student what to do … Continue reading
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Tagged math class, models, naming, representations, unlearning
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Problems in Algebra – part 1
On the heels of the series of posts on multiplication, I’d like to look at particular problem areas in middle school mathematics that show up year after year. Kids make mistakes or have difficulties, each in their own unique way, … Continue reading
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