Category Archives: Algebra

How to Graphically Interpret the Complex Roots of a Quadratic Equation

Posted on September 13, 2019 by drjimo

Very good stuff here. Nice mathematics, nice symmetry, nice visually! Nice paper with an explanation of what is going on by Carmen Melliger here. Good mathematics! Nice graphic by Shana McKay from Scaffolded Math. See also.

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Roots of Unity

Posted on March 5, 2018 by drjimo

on GeoGebra https://www.geogebra.org/m/sZFwAZfs

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The CCSSM, and now the new SAT, have Moved the Needle

Posted on November 19, 2016 by drjimo

Introduction Two days ago I was at an excellent presentation on the new SAT test. It was at the WIU Mini Conference on Secondary Mathematics Teaching. For the second time in 3 years, I experienced, in one 40-minute presentation, a … Continue reading →

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Free Worksheets site – Kuta

Posted on April 26, 2016 by drjimo

https://www.kutasoftware.com/freeipa.html

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Memoranda Mathematica: A Synopsis of Facts, Formulae, and Methods (1912 book)

Posted on August 10, 2015 by drjimo

At this the MathFest (Washington DC 2015) lecture by Richard Guy and John Conway I learned of a book from 1912. Probably only of interest to math geeks. (yep math geek alert) I find it interesting that this reference book … Continue reading →

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Great Reference Sheets (Math)

Posted on June 5, 2015 by drjimo

EEWeb has a very good Math Help page with numerous Quick Reference Sheets Algebra – Properties Geometry – Shapes and Solids Trigonometry – Definition (has unit circle) Trigonometry – Laws and Identities Calculus – Derivatives and Limits Calculus – Integrals … Continue reading →

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Spotting Numbers and Visual Patterns

Posted on March 27, 2015 by drjimo

Here a two great websites that provide lots of great pattern problems. Spotting Numbers Visual Patterns These patterns can be used with elementary students (if you just ask number questions) through advanced algebra (if you include questions about functions). Mathematics … Continue reading →

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