221 threads found:
- Subtracting fractions with borrowing
Focusing on the understanding of fractions, rather than "rules" when teaching
subtraction of fractions with borrowing
- Date of thread's last activity: 7 January 2007
- 17-gon with straight-edge and compass
An explination of Gauss' construction of a heptakaidecagon (17-gon) using a
ruler and a compas
- Date of thread's last activity: 14 October 2009
- Distance from a point to a line.
Derivation of formula for finding the distance from a point to a line, given
the point and the equation of the line.
- Date of thread's last activity: 5 April 2002
- Division
An explanation of various types of division.
- Date of thread's last activity: 22 January 2013
- Problem solving
Help with providing full explanations of answers to word problems.
- Date of thread's last activity: 3 December 2007
- Quadratics
The origins of the word quadratic.
- Date of thread's last activity: 2 December 2007
- A different way to subtract than normally taught
Examples of ways to subtract numbers without using traditional "borrowing"
- Date of thread's last activity: 12 February 2013
- Decimals, even numbers, fractions, and order
Some ways to explain various properities of numbers to students
- Date of thread's last activity: 2 November 1999
- Rounding off-Estimation
Visualizations for helping students to understand rounding numbers
- Date of thread's last activity: 16 October 2000
- Estimation
The difference between methods for estimation: front-end, reasonableness,
clustering, compatible numbers
- Date of thread's last activity: 19 October 2009
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