Abstract: A long-distance learning system includes an instruction studio and one or more remotely located classrooms for students. Each of the student's participation, academic performance, and use of digital resources for a class is evaluated in real time and assigned a color, so the instructor can easily assess each student's progress in the class when presented to the instructor in a display which is only for the instructor.

Abstract: A long-distance learning system includes an instruction studio and one or more remotely located classrooms for students. Each of the student's participation, academic performance, and use of digital resources for a class is evaluated in real time and assigned a color, so the instructor can easily assess each student's progress in the class when presented to the instructor in a display which is only for the instructor.

Abstract: A method and apparatus for performing adaptive calibration of a disk drive assembly and for determining an offset value to compensate for differences in servo head to data head distance from a nominal value. The present invention has particular application in a relative track count servo system where absolute track position is not known from a reading of the servo track itself. In the preferred embodiment, a single head assembly having both a data head and a servo head is utilized. The distance between the data head center and the servo head center must be known so that a disk written on one drive assembly can be read in another drive assembly. This distance is a nominal value but may vary due to manufacturing tolerances. In the present invention, both the data and servo heads are utilized to establish a servo anchor reference track and to determine an offset correction value to compensate for variations in the servo/data head spacing. A dual reference track architecture is employed on the disk surface.