# AUSTRALIA MATHEMATICS LESSONS

## AU1 EXTERIOR ANGLES IN A POLYGON

This eighth grade mathematics lesson focuses on investigating exterior angles in polygons. It is the third lesson in a six-lesson unit of work related to "Working Mathematically with Space - Making and Testing Conjectures". The lesson is 45 minutes in duration. The lesson was taped in a computer laboratory. There are 32 students enrolled in the class.

## AU2 CONGRUENCE

This eighth grade mathematics lesson focuses on developing student understanding of congruent triangles. It is the second lesson in a twelve-lesson unit of work focused on congruent triangles. The lesson is 47 minutes in duration. The lesson was taped in a girls' school. There are 26 students in the class.

## AU3 DATA COLLECTION AND REPRESENTATION

This eighth grade mathematics lesson focuses on simulation and data collection. It is an extension lesson following a nine-lesson unit of work focused on statistics. The lesson is 42 minutes in duration. There are 29 students in the class.

## AU4 RATIOS

This eighth grade mathematics lesson focuses on developing student understanding of ratios. It is the fourth lesson in a seven-lesson unit of work focused on ratio and rates. This is a "double lesson" of 69 minutes duration. There are 30 students in the class.