## Browse - Specific Math Concepts/Techniques

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1. 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

2. 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

3. 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

4. Division
An explanation of various types of division.
- Date of thread's last activity: 29 December 2015

5. Problem solving
Help with providing full explanations of answers to word problems.
- Date of thread's last activity: 3 December 2007

The origins of the word quadratic.
- Date of thread's last activity: 2 December 2007

7. 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

8. 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

9. Rounding off-Estimation
Visualizations for helping students to understand rounding numbers
- Date of thread's last activity: 16 October 2000

10. 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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