Published in SEDL Letter Volume XXII, Number 1, Spring/Summer 2010, Science, Technology, and Math
Photo of a girl feeding a llama.

SEDL Letter, The Award-Winning Magazine of SEDL

Wesley A. Hoover, PhD, President and CEO
Christine A. Moses-Egan, MA, Director, Communications
Laura Shankland, MA, Editor
Joni Wackwitz, Contributing Editor
Shaila Abdullah, Designer
Jane Thurmond, Designer
Nancy Reynolds, MLS, Librarian


The photos on the front and back cover, pages 2, 8–9, and 12 are courtesy of Danny Martinez. The photos on pages 6–7 are courtesy of Ysleta Independent School District. The images on page 11 are courtesy of the Lunar and Planetary Institute. The product photo on page 15 was provided by McGraw-Hill Education. All other photos are ©Thinkstock.

SEDL Letter complements and draws on work performed by SEDL under a variety of funding sources, including the U.S. Department of Education and the U.S. government. The publication is not supported with direct program funds related to any SEDL programs or projects. SEDL Letter does not necessarily reflect the views of the U.S. government or any other source. You are welcome to reproduce SEDL Letter and distribute copies at no cost to recipients; please credit SEDL as publisher and respect the copyrights of designated illustrators, designers, and contributors. SEDL is an Equal Opportunity/ Affirmative Action Employer and is committed to affording equal employment opportunities for all individuals in all employment matters. Available in alternative formats. Cover photo: Violet Lucero and a student from Magdalena Municipal School District