Student Research Project has sections on graphing and data analysis.

NSW public Schools has a list of numerous resources for teaching mathematics including lesson plans from “Counting On” that could support the processes of data analysis and drawing conclusions.

A worksheet on an investigation into the size of a jar covering a burning candle and the time it takes for the candle to extinguish and the shedding of skin by an iguana in which students process the second-hand data and draw conclusions.

A case study in Interpreting River Health Data from Waterwatch Victoria provides an interesting example of issues in exploration and interpretation of data.

This resource contains an excellent online activity to teach students data handling skills and give them instant feedback. Three games can be found based on probability and calculating averages at this link. This site also links to some print-off activities on data handling, with links to the answers. More games on data handling are found at Gamequarium (not all links work).