Interested adults should attend the training on August 22 FIRST encourages students to explore science and technology. EXTON – The Chester County Library and District Center will hold a New Coaches Training Session for Jr. FIRST* Lego League (FLL) and FLL on Thursday, August 22 from 5:30 p.m. to 8:30 p.m. in the Struble Room. Anyone interested in being a Jr. FLL or FLL coach in the upcoming...