http://www.worsleyschool.net/science/files/saltandfreezing/ofwater.html - explains about what happens to the molecules in the water during the freezing process.
http://www.newton.dep.anl.gov/askasci/env99/env133.htm - explains about ions in the water, info about crystal formation during the freezing process.
http://www.scienceproject.com/projects/intro/primary/PX071.asp - project.
http://en.allexperts.com/q/Oceanography-2135/salt-water-freezing-1.htm - explains from a chemistry-ish perspective why the salt water lowers the melting and freezing temperatures of the water.
http://www.picotech.com/experiments/freezingofwater/freezingofwater.html - experiment info.
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