CK-12 Foundation
Ck 12: Vector Sum and Difference
[Free Registration/Login may be required to access all resource tools.] Looks at finding the direction and magnitude of vectors and breaking vectors into component parts.
CK-12 Foundation
Ck 12: Solving Logarithmic Equations
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving logarithmic equations. Students learn how to solve a logarithmic equation with any base.
Mathematics Archives
Math Archives: Visual Calculus: Graph a Function, Its Second Derivative
This online tutorial site shows that the concavity of a function is related to the second derivative of the function by using an online graphing system. Inflection points are also briefly discussed.