Georgia State University
Georgia State University: Hyper Physics: Magnetic Properties of Solids
This site from the Georgia State University contains a good overview of some of the magnetic properties that are common to all materials, such as susceptibility and permeability, and then specific discussion of both diamagnetic and...
Other
University of Kiel: Paramagnetism
Although this is a technical description of paramagnetism, with many equations, it is still possible to glean conceptual information with a little bit of work.
National High Magnetic Field Laboratory
Magnet Academy: Diamagnetism and Paramagnetism
Think iron, nickel and other "ferromagnetic" substances are the only ones with magnetic properties? In fact, everything reacts to magnetic fields in some way.
Wikimedia
Wikipedia: Paramagnetism
This Wikipedia site is an introduction to paramagnetism and paramagnetic materials.
Georgia State University
Georgia State University: Hyper Physics: Paramagnetism
This site from the Georgia State University provides a brief introduction to paramagnetism, explaining how paramagnetic materials exhibit magnetization proportional to an applied magnetic field according to Curie's law.