This Earth Day, my colleague Tim Wheeler, writes about green schools on his environment blog. Maryland Public Television is airing a documentary, "Growing Greener Schools," at 4:30 p.m. today (with a rebroadcast for early risers at 4 a.m. Friday). The show looks at how environmentally oriented curriculums and green buildings are changing students, families and communities. In addition, Pinewood Elementary in Baltimore County is being honored by the National Education Association for its Earth friendly efforts.