# UNITED STATES MATHEMATICS LESSONS

## US1 Graphing Linear Equations

This eighth grade mathematics lesson focuses on graphing linear equations. It is a review lesson that followed a unit of work on this topic. The lesson is 44 minutes in duration. There are 36 students enrolled in the class.

## US2 Writing Variable Expressions

This eighth grade mathematics lesson focuses on writing variable expressions. It is the introductory lesson to a unit of work on equations. The lesson is 53 minutes in duration. There are 31 students enrolled in the class.

## US3 Exponents

This eighth grade mathematics lesson focuses on calculating with exponents. It is the first lesson in a sequence of 12 lessons on this topic. The lesson is 50 minutes in duration. There are 36 students enrolled in the class.

## US4 Secants and Tangents

This eighth grade mathematics lesson focuses on the measurement of angles formed by secants and tangents intersecting with a circle. It is the fourth lesson in a six-lesson unit on this topic. The lesson is 45 minutes in duration. This is an advanced eighth grade geometry class. There are 15 students enrolled in the class.

## US87 (from TIMSS 1995 Video Study)

This lesson is on interior angles of a polygon.

The lesson was released following the TIMSS 1995 Video Study and is included here because of high interest in it among educators. Resource materials from the lesson are not available