Conversation so far:
What areas of social activism was Carlos Delgado most interested in?
As part of the Navy-Vieques protests Carlos Delgado was actively opposed to the use of the island of Vieques, Puerto Rico as a bombing target practice facility.
Did Carlos Delgado protest in another ways?
In the 2004 season, Carlos Delgado protested the war by silently staying in the dugout during the playing of God Bless America during the seventh inning stretch.
Were Carlos Delgado's protests successful?
July 21, 2004, Carlos Delgado was booed by Yankee fans for his passive protest during a game at Yankee Stadium.
Did Carlos Delgado do anything for social activism besides protests?
Among other charity work, Carlos Delgado is well known for his generous visits to hospitals in his hometown where, on Three Kings Day, he brings toys to hospitalized children.
Does Carlos Delgado still do things for charity?
Carlos Delgado has also contributed to improving Puerto Rico's public education system.

Question: How did he contribute to their education system?
Self-contained rewrite: How did Carlos Delgado contribute to their education system?