We know that teachers themselves have to use academic discourse if their
students are ever going to have a chance to learn. Third, the balance of talk in
this classroom is heavily weighted toward the teacher. If we count the number of
words used, minus the student names, the teacher used 190 words, whereas the
students used 11. This means that 94 percent of the words used in the classroom
during this five-minute segment were spoken by the teacher. In addition, if we
analyze the types of words used, half of the words spoken by the students were
not academic in nature. That's not so great. Students need more time to talk,
and this structure of asking them to do so one at a time will not significantly
change the balance of talk in the classroom.