Here are some data management websites to explore.

http://math5.nelson.com/studentcentre/studtryout.html

http://www.ixl.com/math/grade-5/create-line-graphs

http://www.ixl.com/math/grade-5/line-graphs

http://nces.ed.gov/nceskids/createAgraph/default.aspx

http://www.bbc.co.uk/schools/ks2bitesize/maths/data/frequency_diagrams/play.shtml