About the Author
Mari Vargo is an experienced writer, editor, and educational consultant based in San Francisco. She has written and developed a wide variety of print, online and multimedia products, for primary and secondary school, community college, adult school, and university students. Laurie Blass is an experienced writer and content developer specializing in English Language Teaching materials. She is the author/co-author of several successful ELT titles, including Tapestry Writing from National Geographic Learning. She is also the co-manager of an e-learning consulting company based in Corte Madera, California.