This digest begins with a brief description and review of the development of optical disks. Optical disk formats are then described by capability: Read Only Memory (ROM), Write Once, Read Many (WORM), Interactive (I), and Erasable (E); forms of information (audio, text or data, video or graphics, or a combination); and disk size (most often 12 or…

Classroom assessment measures, in the past often limited to multiple-choice and standardized tests, now can involve the creation of portfolios, or collections of pieces of work which the student selects as the best representation of his or her efforts, progress, skills, and accomplishments. Portfolios also usually include teacher evaluations and…