AM/PM Attendance vs. Period Attendance
The jmc Attendance module includes features necessary to record AM/PM (full-day/half-day) attendance whereas the jmc Period Attendance module expands upon that to allow for recording of attendance by period. 

In the Period Attendance module, a conversion from Period Attendance to Attendance can be generated which allows for full day/half-day attendance to be updated in the Attendance module based on number of periods absent and the reasons for their absence.

Custom Forms
Custom forms may be generated in the Period Attendance module and may be used in conjunction with reports from various jmc modules for customized reporting. 

Custom form options include period attendance form letters, student information forms, report cards (including standards-based report cards), and other form letters.

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