Original sentence: Founded in 1969 by the noted physicist and educator Frank Oppenheimer, the Exploratorium offers visitors a variety of ways—including exhibits, webcasts, websites and events—to explore and understand the world around them.It also aims to promote museums as informal education centers.The Exploratorium is a museum in San Francisco full of hundreds of hands-on exhibits, most of them made onsite, that mix science and art
Edited sentence: At the 4th Science Center World Congress in Rio 2005, science centers from 5 continents ranked the Exploratorium as the number one science center in the world.At the Exploratorium, more than a 100 high-school-age Explainers learn by teaching each year; 40,000 copies of Exploratorium publications are sold annually, and its multiple Webby award-winning website receives 20 million unique visits.Behind the scenes are youth-development efforts, homeschool and after-school programs, arts residencies, media experiments, teaching programs, informal education research, and science teacher professional development.Curiosity is what is behind this giant experimental laboratory where visitors tinker with hundreds of exhibits.In 2011 the Exploratorium was nominated for a Webby Award in the category of Best Visual Design - Function.In addition to engaging the public in discovery and science play, it is know for education reform, working directly with teachers and school districts in changes in the teaching of science.More than 6,000 teachers have participated in professional-development programs, including elementary, middle and high school teachers, staff developers, school leaders, college professers, and after-school professionals from all 50 states.More than 90,000 students and teachers visit on field trips every year, and another 3,500 students - many from San Francisco's underserved neighborhoods – take part in its Educational Outreach program.The Exploratorium, based in San Francisco, is considered the prototype of participatory museums in the US and internationally