Nathaniel and Theo, two high-school students in Weston, are offering to tutor students in the Scratch programming language. Both students have completed college-level courses in computer science and have experience working with kids. They offer one-on-one tutoring sessions (at $20/hour) at the Weston Public Library and the Newton Free Library. Their Scratch tutoring is part of the students’ social venture in vermicomposting called MunchPoop, to help address climate change. Go to their website for additional information or to sign up.