University of Saskatchewan (Canada)
University of Saskatchewan: Exponential and Logarithmic Functions
The University of Saskatchewan's Department of Mathematics and Statistics provides high school students with online tutorials and exercises on what they deem some of the most important topics in exponential and logarithmic functions....
Windstream
Ojk's Precalculus Study Page: Sample Test
A practice test on exponents and logarithms, covering the basics and going through solving exponential and logarithmic equations.