1 Biologya branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws:the mathematical sciences. 2  Biologysystematic knowledge of the physical or material world gained through observation and experimentation.
Bracha Alpert has identified three different patterns of classroom discourse: (1) silent (the teacher talks almost all the time and asks only an occasional question),(2) controlled (as in the excerpt above), and (3) active (the teacher facilitates while the students talk primarily to each other).
Discourse community A discourse community is essentially a group of people that shares mutual interests and beliefs. âIt establishes limits and regularities...who may speak, what may be spoken, and how it is to be said; in addition [rules] prescribe what is true and false, what is reasonable and what foolish, and what is meant and what not.â (Porter, 39).