Written by Alyssa Burley.

On January 13, 2015, Crystal Howard, Alyssa Burley, James DeCarolis and Angela Driscoll visited the Armed Services YMCA in the Tierrasanta area of San Diego.

Two groups of elementary students from throughout San Diego County participated in the sieve analysis and concrete activities.

Photos by Alyssa Burley

To request a visit from Project Cornerstone at your school or program, contact Alyssa Burley at alyssa@project-cornerstone.org or call (619) 284-8515.