While state requirements vary on the number of instructional days and/or hours in the school year, the majority of. states require 180 days of student instruction. Most also specify the minimum length of time that constitutes an. instructional day.
Media Mix. Definition: Media Mix. Media Mix refers to the combination of advertising channels that is used in the promotion of a particular good or service. The idea is to choose the right combination to communicate with the audience and make an impact as estimated in the media planning strategy.
Note that the signs in a model of a sign system may be expressed using more than one medium at once; for example, TV is an audio-visual mix. But of course a mixture of media may be regarded as a single mixed medium; such media are characterized by relations of simultaneity among some parts, as opposed to pure sequentiality.