Introductory lesson plan for pie charts including pie chart blanks with 24, 30, 36, 40, and 50 spokes (pdf file).

Flipchart for pie charts lesson.

Excel file to create pie chart for travel to school data (can be adapted) from frequency table. Includes pie chart blanks too.

See also the Improving Learning in Mathematics Statistics Unit S5 Interpreting bar charts, pie charts, box and whisper graphs.