| Part 2:
Presenting and Discussing Problems [Begin: 17:18]
|
The teacher presents the
problem 1/(x - 7) + 1/(x2 - 49) on the
overhead projector and says to the students,
"Yesterday we worked on least common denominators.
Try this problem." While the teacher passes out the
homework worksheets, the students work on this problem
individually. After about one minute, the teacher
reconvenes the class to ask for the solution. Some
students have difficulty, so the teacher explains each
step. She then continues the lesson by presenting a
second problem, [5/(x + 6)] - [(2-x)/(x + 6)], and warns
students that "this one looks easier but there is a
trick to it." Students work individually on the
problem for about one and a half minutes. During this
time, the teacher moves from desk to desk, checking
students' work. When the teacher announces the answer,
some students ask for an explanation. The teacher
provides a brief explanation by asking students to fill
in several steps leading to the answer. |
