FALLBROOKFALLBROOK — For hundreds of years, scientists and musicologist have puzzled over the secret behind the one-of-a-kind sound produced by 17th-century Stradivarius and Guarneri del Gesu violins.

There's a national education movement to teach U.S. students 21st-century skills, including the four C's: critical thinking, collaboration, communication and creativity. As part of that, Canal ...