Bridgewater-Raynham Regional High School is hosting a 5K road race Sunday at 10 a.m. at the high school to benefit One Fund Boston, the fund set up to help victims of the Boston Marathon bombing. Gayle Arrighi said she and her niece, Lindsay Arrighi, both teachers in the Bridgewater-Raynham schools, got the idea for the event, and when Lindsay Arrighi presented it to one of her classes as a senior project, the students embraced it. Today’s race will feature a marching band, singing of the national anthem, raffles, and appearances by local dignitaries. The registration fee is $25 in advance through www.racewire.com or at the race starting at 8:30 a.m. Advance registrants receive a T-shirt. Students working on the race are Nick Gordon, Kevin Power, Lawryne Boyle, Alley Degrace, Ariana Burkett, and Paige Bjorkman.