Glossary of Statistical Terms
This excellent site can help you whenever you have a question about a statistical term.
http://www.stat.berkeley.edu/users/stark/SticiGui/Text/gloss.htm

Statistical Resources
The University of Michigan Documents Center has an excellent site of Statistical Resources on the web. You might wish to explore the richness of this site when you have time or look up a particular item if you are having trouble.
http://www.lib.umich.edu/govdocs/stats.html

The Normal Curve
This interactive site may help you determine what values of the mean and standard deviation will give a curve that looks like a normal curve.
http://stat-www.berkeley.edu/users/stark/Java/StandardNormal.htm

Sampling
An excellent discussion of the nature of sampling, along with some examples.
http://faculty.ncwc.edu/TOConnor/308/308lect03.htm

Sampling Article
This is an article, "Statistical Sampling: An Important Tool, Not a Political Football," from the American Mathematical Society.
http://www.ams.org/new-in-math/press/sampling.html