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After learning about handwriting analysis and questioned document examination, students set out to determine if any receipts from Tumbling Water Land Development Company have been forged. To do this, students must determine objective criteria for handwriting analysis, and then apply these criteria when examining suspect receipts.Analyze handwritingDissolve the ink from numbers on the suspect invoicesUse thin-layer chromatography to create an ink profile for each of the samples taken from the receiptDetermine if the same ink was used to fill out the entire formDevelop a complete theory of the suspected forgeryClass size: six groups of up to five students per groupFor high school and undergraduate coursesMeets National Science Education Standard