Excel 2013: Sharing and Collaboration Prepare to Share   1. Readings Read Lesson 6 in the Advanced Excel Guide, page 195-243. Watch the video.   Project This lesson shows how to prepare a file for sharing including: proofing, comments, and tracking changes. The lessons will show how to protect a spreadsheet.   Downloads Customer Sales 2013 PivotChart.xlsx. Time Sheet 2013.xlsx (Complete) Sample Excel Chart-2013.xlsx   2. Practice There is no Practice Activity in this lesson.   3. Assessment Review the Test questions on page 244.