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.
Defined Media versus Complex Media. Some media formulations are very specific recipes in which certain ingredients must be present in specific amounts. These defined media (also known as synthetic media) are used to grow bacteria that have very particular needs. Continued ...