Riggs Elementary - (2013-2014) Riggs Elementary third grade students recently participated in a field trip titled 'Chores for Charity.' Students completed chores at home, raising a grade level total of $2,285. The students purchased items up to their allotted amount. After their shopping excursion, students traveled to The Chandler Food Bank and delivered the 1,909 pounds of food. The food provided 1,490 meals to needy families in the Chandler area.