Google - a powerful search engine http://www.google.com/
Google image - a powerful search engine for pictures http://www.google.com/images
Earned Run Average calculator http://www.baseballtips.com/era.html
Baseball Dictionary http://www.enlexica.com/sp/bb/
Baseball Dictionary http://www.sportfanatics.net/Articles/Baseball/Baseball_Definitions.htm
Baseball Dictionary http://games.espn.go.com/content/legends/2002/story?page=glossaryterms
BASEBALL STATISTICS - great for everything but ERA. http://www.baseball-reference.com/
BASEBALL STATISTICS http://sports.espn.go.com/mlb/statistics
BASEBALL STATISTICS http://www.sportsline.com/mlb/stats
BASEBALL STATISTICS http://sports.yahoo.com/mlb/stats
This is a great site for team logos http://www.logoshak.com
Mean - basic formula http://www.aaamath.com/B/sta418x5.htm
Mean - simple definition with interactice problems http://www.edhelper.com/statistics.htm#S1
Mean - complex definition http://www.statcan.ca/english/edu/power/ch11/mean/mean.htm
A great site for creating graphs, however you still must do yours by hand. http://nces.ed.gov/nceskids/createagraph/index.asp