Use filters on the Analysis page to keep track of students that are in danger of truancy. You can view the info either in the analysis chart, in a pivot table, or both. Set Data to Attendance, Breakout to By Scholar, and Series Breakout to By Attendance Type. Choosing a horizontal bar chart is useful for this report.
Then, in Attendance Filters, select only Absent Unexcused and Absent Excused from the Attendance Type dropdown (or whatever codes count toward truancy at your school). If you want to track truancy for only a certain group, select that group from the Scholar Filters menu.
For a different perspective on things, use the Pivot Table View. Once you’ve configured the chart as detailed above, set Left to By Student and Left Breakout to By Attendance Type. Then, set Top to None.