Daniel de Vise:

Parents and students in a growing number of Washington area schools can track fluctuations in a grade-point average from the nearest computer in real time, a ritual that can become as addictive as watching political polls or a stock-market index.
The proliferation of online grading systems has transformed relations among teachers, parents and students and changed the rhythm of the school year. Internet-based programs including SchoolMAX and Edulink are pushing mid-term progress reports into obsolescence. Prospective failure is no longer a bombshell dropped in a parent-teacher conference. A bad grade on a test can’t be concealed by discarding the evidence. A student can log on at school, or a parent at work, to see the immediate impact of a missed assignment on the cumulative grade or to calculate what score on the next quiz might raise an 89.5 to a 90. Report cards hold little surprise.
“Half of the time, I know what grade my daughter got on something before she does,” said Susan Young, mother of an eighth-grader at Montgomery Village Middle School in Montgomery County.
Parents say the programs reconnect them to the academic lives of their children, a relationship that can decay as students move from elementary to middle and high school.

The Madison School District uses a system called “Infinite Campus“. A number of nearby districts use Powerschool, among others.