Volunteer and 2010 Har-Ber graduate Derrick Graham, center, works Friday, April 5, 2013, to start a fire for a group of Har-Ber National Honor Society members during the Camp Cardboard event at the school. Students will sleep outdoors from 6 p.m. Friday until 6 a.m. today to raise awareness for homelessness and funds for House for Hope, which serves the homeless in the community.