Kairi Burr digs for potatoes with fellow second-graders at Riverton Elementary School in Portland on Friday while harvesting crops that they planted last spring. Portland Public Schools' food service has been working with Cultivating Community to help children learn about nutrition, science and stewardship. The food service will serve the potatoes, along with potatoes from local farms, during a special local foods day next week.

Second-graders at Riverton Elementary School in Portland harvest potatoes that they planted in the spring.

Kairi Burr, left, and Aaliyah Davis wash potatoes that second-graders at Riverton Elementary School harvested Friday.

Potatoes fresh from the ground at Riverton Elementary School get a wash during Friday's harvest.

Hamza Alhamdany displays some of the potatoes that he dug up while harvesting crops with fellow second grade students at Riverton Elementary School.

Aaliyah Davis adds to the haul of potatoes harvested by second-graders Friday at Riverton Elementary School.