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The mathlet graphs solution functions $$x(t)$$ and $$y(t)$$ to the system of differential equations $$x' = f(x,y)$$ and $$y' = g(x,y)$$, with initial values given by $$x(t_0)=x_0$$ and $$y(t_0)=y Graphs solution functions \(y(x)$$ to the differential equation $$y'=f (x,y)$$, with initial value given by $$y(x_0)=y_0$$. The student can zoom in and out of the graphs.

Timeline of contributors to formulation of the Calculus with biographies: Click on the historical figure's image to see his biography and two links to further online information.

The authors recount the 'great tale' of Napier's and Burgi's parallel development of logarithms and urge you to use it in class.

Using the history of mathematics in a college algebra class has had significant positive effects on student learning.

A systematically presented multi-page course on basic trigonometry: trigonometry of triangles, laws of sines and cosines, angles, radian measure, trigonometric functions.

This is a Loci article that includes five GeoGebra applets to illustrate topics in real analysis, or a rigorous course in calculus.

This GeoGebra applet allows interactive and visual exploration of the relationship between continuity and differentiability.