| Part 1: Sharing Homework [Begin: 00:48]
|
The lesson begins with the teacher asking a student to present her homework results.
The student uses an overhead projector to show her results and explain what she did.
There are three problems; one of them is, "A rectangular bowl of glass with
a width of 14.6 cm and a length of 8.4 cm is filled with 17 mm of quicksilver (density
13.6 g/cm3). What is the mass of the quicksilver?" After the student explains
her solutions, the teacher leads the class in a discussion of the results. The teacher
says, "Who confirms this result?" and "Does anybody else have any
other suggestions for an alternative?" When mistakes are pointed out, the presenter
makes corrections on the transparency. Reviewing the homework in this way continues
for about 10 minutes. |
