Top Posts
 Math in the Comics  part 1
 Math in the Comics: The Series
 Groupings, Shopping Lists, Vectors: part 18
 Middle School Math  What is Hard?
 Notes on Representation  Large Numbers
 Tally Marks and Roman Numerals
 Math in the Comics  part 5
 Math in the Comics  part 10
 Operators, Functions, and Properties  part 40
 Math in the Comics  part 7

Recent Posts
 Mathematical Notations and Schools – 15
 Mathematical Notation and Schools – 14
 Mathematical Notation and Schools – 13
 Mathematical Notation and Schools – 12
 Mathematical Notation and Schools – 11
 Mathematical Notation and Schools – 10
 Mathematical Notation and Schools – 9
 Mathematical Notation and Schools – 8
 Mathematical Notations and Schools – 7
 Mathematical Notations and Schools – 6
 Mathematical Notation and Schools – 5
 Mathematical Notation and Schools – 4
 Mathematical Notation and Schools – 3
 Mathematical Notation and Schools – 2
 Mathematical Notation and Schools: The Series
Blogroll
 attribution
 black box
 deferred computation
 denominations
 discoverable
 education
 embedding
 equivalence
 extending patterns
 gauntlet
 graded hurdles
 invariants
 lookup
 math class
 math in the comics
 matrix multiplication
 models
 naming
 notation
 puzzle
 recurrence relationship
 representational proof
 representations
 reverse engineering
 selection
 series on math learning
 sieve
 sorting
 standing on nothing
 state
 unlearning
 whole vs. parts
Archives
 July 2011
 June 2011
 May 2011
 April 2011
 February 2011
 January 2011
 December 2010
 November 2010
 October 2010
 September 2010
 August 2010
 July 2010
 May 2010
 April 2010
 March 2010
 February 2010
 January 2010
 December 2009
 September 2009
 August 2009
 July 2009
 June 2009
 May 2009
 April 2009
 March 2009
 February 2009
 January 2009
 December 2008
Tag Archives: puzzle
A Multiplication Nomograph
This is a puzzle. If you look at the picture below: you see numbers on the left, in red, and numbers on the right, in red. If you connect the number 2 on the left with the number 4 on … Continue reading
Coins and Change
This is a puzzle. Imagine the country of Jockland, where coins exist in the following denominations: 3~, 5~, 30~, 50~, 300~, 500~, etc., with ‘~’ their equivalent of the penny. But there is no single~ coin. If people need to … Continue reading
Skinny Multiplication Table
This is a puzzle. Imagine a lookup table like this: and that this table is used for multiplication. Obviously, this multiplication table must be used differently from the usual one, because it is a onedimensional table, long and skinny. To … Continue reading