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The expression $$0^0$$ is usually called an indeterminate form.

Leibniz: First Published Rules for the Derivative: Images of the first appearances of the Product and Quotient Rules in print in an article by Leibniz in a 1684 issue of the journal Acta Eruditoru
Essay giving a brief overview of the history of calculus from ancient Greeks to Cauchy, with dozens of links to biographies of the mathematicians involved, including Archimedes, Newton and Leibniz
Mathematica demonstrations covering almost every aspect of high school algebra and geometry needed for the study of calculus.

Fun and easy-to-use interactive game to help students learn or review polar coordinates and, in particular, radian measure of angles as a decimal number (rather than a multiple of $$\pi$$).

Seven interactive Flash applets that the user may customize for classroom use, with clear instructions included for doing so.
In the epsilon-delta definition of a finite limit, the student gets to select a limit point and epsilon and then adjust left and right deltas to satisfy the definition.
Students choose one of 9 functions and a limit point. Then they can see the value of the function as $$x$$ gets closer to the limit point.

In the $$\epsilon$$-$$N$$ definition of a finite limit at infinity, the students gets to select $$\epsilon$$ and then adjust $$N$$ to satisfy the definition.

In applying l'Hospital's rule to the limit of a quotient with indeterminate form 0/0, a student gets to select the numerator and denominator from a list of 6 functions.