Theodore Johnson has worked as a science educator for more than 17 years. During this time, he has taught students from a variety of socioeconomic and cultural backgrounds as well as different levels of academic achievement. For the past 10 years, he has taught at Lowell High School in San Francisco, a high-achieving public school. Prior to moving to San Francisco, he taught in the Providence Public Schools (Rhode Island) where he helped plan and implement the district's first science magnet high school, and contributed to a district-wide standards-based curriculum redesign. Mr. Johnson holds