I keep an eye out for science articles related to astrobiology. Recently some big ideas in astrobiology have been announced including the Earth First Origins, a major project supported by NASA Astrobiology led by Rensselaer Polytechnic Institute. Perhaps of interest to students and teachers is the New Arecibo Message. Students are required to solve a puzzle to log in for more information. The puzzle looks challenging and intriguing.
More discussion of Astrobiology in Gerry's Gene Scene YouTube vlog.