The Pioneer Charter School of Science is holding open enrollment for the 2014-2015 school year. The school serves seventh- to 12th-grade students at two campuses, one in Everett and the other in Saugus. The Everett campus serves Chelsea, Everett, and Revere, while the Saugus campus serves Danvers, Lynn, Peabody, Salem, and Saugus. As with all other charter schools, Pioneer is tuition-free and open to all Massachusetts students, but residents from the districts served by each campus receive priority placement. Families can apply for enrollment through an online application on Pioneer’s website, www.pioneercss.org, or submit a paper application. A lottery will be held if needed to select students for enrollment. This year’s lottery is scheduled for March 13 at the Everett campus. Students who do not receive spots will be placed on a waiting list and will be contacted as openings become available. For information, parents can call the school at 617-389-7277.