The Madison School District (PDF):

In the spring of 2012 data was collected indicating a wide array of teacher grade book usage on Infinite Campus. Following the distribution of the letter on August 27, 2012 a number of concerns were brought forth regarding the use of grade book. Music and Physical Education teachers at the middle school level have larger class sizes and teach on an alternate day rotation in many cases. Currently, members of Curriculum and Assessment are working with Music and Physical Education teachers to develop a set of guidelines that are practical due to their schedules.
Following the end of the first quarter, November 7, we will gather data and measure the use of teacher grade book. The Assistant Superintendent for Secondary Schools will share the data with building principals to address areas of concern.
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Across our middle and high schools, a number of you have utilized the Infinite Campus grade book.
Parents,guardians and other youth service providers appreciate the information regarding student progress. This year, the MMSD opened an online student enrollment option for families. The feedback is clear, a high percentage of MMSD families utilize Infinite Campus. The Research and Evaluation Department has analyzed the number of Infinite Campus grade book entries in all of our schools and it is evident to me that we have yet to reach our full implementation by having all teachers using the Infinite Campus grade book and consistently updating student progress. Therefore, it is my expectation that all teachers follow the below guidelines as we enter the 12-13 school year.

Infinite Campus (million$ have been spent) usage issues continue…
A few links: