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Scholastic
Bingo Lingo
Word roots can be great fun when part of a game! Practice a variety of different roots with this nicely put-together bingo game that comes with plenty of instructional ideas.
Curated OER
Building a General Quadratic Function
Learners rewrite a general quadratic function by completing the square to see a new form of the function that more easily identifies the x-coordinate of the vertex and the two roots of the function.
Digital Public Library of America
The American Whaling Industry
When thinking about the American whaling industry most imagine Moby Dick and Nantucket sleigh rides, harpoons and scrimshaw, whale-oil lamps and baleen in women's corsets. But it may come as a surprise that the industry was also...
Texas Instruments
Texas Instruments: Finding the Roots of a Cubic Equation Math History
In this Derive activity, students understand how the software solves cubic equations and relate it to contributions made by del Ferro, Tartaglia, and Cardan in finding the method of solving cubic equations.
Wolfram Research
Wolfram Math World: Quadratic Equation
This MathWorld site shows how to derive the quadratic formula.
Interactive Mathematics
Interactive Mathematics: Newton's Method
This lesson provides an example demonstrating the iterative method of finding the roots of a function using derivatives.
Texas Instruments
Texas Instruments: Cubic, Zeros and Tangents
In this Computer Algebra System (CAS) activity, students use CAS to prove a theorem regarding cubic functions, their zeros [roots], and tangents to the curves.
Help Algebra
Help algebra.com: Quadratic Formula
This presentation of the quadratic equation includes a discussion on the discriminant and a derivation of the quadratic formula.