**Time:** Approximately 60 minutes**
Materials:**
meter stick, pencil, paper, calculator with trigonometric
functions, and student worksheet:
Eratosthenes.doc

**Implementation:** This RWLO can be used either in the
classroom to demonstrate the learning objectives or provided as an activity / homework assignment
enabling the students to discover the
process themselves. Students can work individually or in small
groups but it is recommended that each student answer the
questions.

**Steps:**