Here is an example summary of this reading selection:

Francine Wheeler shares her personal experience of losing her first-grade son, who was shot during the tragedy at Sandy Hook Elementary School in December 2012, and asks viewers to join her in persuading the U.S. Senate to pass reforms to existing gun-control laws. She argues that such reforms will prevent tragedies like the one she and her family experienced.

Your summary will differ from this one in the way it is written, but it should include roughly the same information.