The Santa Rosa High School Math Festival needs 10 volunteers to cover shifts on Wednesday, May 15. Hours are from 8:30 a.m. to 12:10 p.m. and from 12:30 to 3 p.m. No math knowledge is needed. For more information, call Marlene at 528-5292.

Sonoma County is looking for volunteers to assist with the Celebrating Healthy Sonoma event on Saturday, May 25. Volunteer jobs include setup, greeting, registration and concessions. For more information, contact the Volunteer Center at 527-6655 or lauren@namisoco.org.

JustHealth is looking for a volunteer to assist in the development and implementation of a major fundraising campaign. Volunteer qualifications desired are at least two years of successful experience in fundraising work and a passion to see JustHealth’s mission fulfilled. To help, call John Metz at 800-878-7833.

The Windsor Green Half Marathon, 10k and 5k is looking for volunteers to help during prerace registration and on race day. Registration volunteers are needed from 11 a.m. to 5 p.m. Saturday, May 18. Race-day volunteer hours are from 6 to 11:30 a.m. Sunday, April 19. For more information, contact Brad at info@eventswithsole.com, or visit runwinecountry.com.

FundK12 is looking for a volunteer to serve as a marketing intern. FundK12 is an organization that helps raise funds for schools in the community. The volunteer will conceptualize, create, send and report on a variety of email-based  marketing campaigns. For more information, contact Eric at eric@fundk12.org.

Goodwill Industries has opened Good Eats Kitchen, a culinary training facility at 3400 Chanate Road in Santa Rosa,  offering food to go  prepared by  students. Go to www.wellnessandadvocacy.org to view information about the program, as well as the current menu and hours. Ongoing weekly.

The Charles Schulz Museum seeks students 14 and older to assist with summer classes for children. The summer workshop orientation is from 5 to 6:30 p.m. May 29. Contact Kristi at 284-1271, or kristi@schulzmuseum.org to register. For information, see schulzmuseum.org.

The Redwood Empire Food Bank is looking for volunteers for its Hunger-Free Summer Lunch Program starting in June. More than 100,000 meals are served to children throughout Sonoma County. To help, contact Vanessa Bautista at 523-7900, ext. 155, or vbautista@refb.org.

Catholic Charities is seeking volunteers to sort donations in advance of the opening of a new thrift store in July. Volunteers need to work independently to intake and sort donations. Contact bkeating@srcharities.org or 528-8712, ext. 160.

West County Health Centers is recruiting volunteers to serve as waiting-room hosts and perform community outreach. Volunteer training will be held May 22 and 29. Contact volunteer program manager Marty Dekay-Bemis at 869-5977, ext. 3312, or mdekay@wchealth.org.

The Volunteer Center of Sonoma County is looking for volunteers for Saturday’s Human Race. The race is the center’s annual fundraiser to support local nonprofits. If you are interested in helping out either in the days leading up to the event or on race day, contact Alicia Alexander at 573-3399, ext. 104, or aalexander@volunteernow.org, An orientation dinner for volunteers is set for Thursday at the Volunteer Center.

The Community Support Network is looking for volunteers to help with registration and refreshments for its annual fundraiser, the “CSN 500 — Racing the Law,” set for May 18 at Driven Raceway in Rohnert Park. The event will include teams led by Santa Rosa Police Chief Tom Schwedhelm, Sonoma County Sheriff Steve Freitas and Supervisor Efren Carrillo. Good music and food will also be on hand. If you’d like to volunteer, contact Hazel at 575-0979, ext. 20, or hazel@csn-mh.com.