The City of Lewisville is offering a Swimming Pool Operator Course for all public and private pool operators on Thursday, March 16, 8 a.m. to 5 p.m., at the Hedrick House, 1407 Creekview Drive. Courses will be taught by a certified instructor. Pre-registration is required. To register, go to the Health Services page on cityoflewisville.com., Pre-registration must be done by Monday, March 13. The course fee is $100 per attendee. Cash or check payments will be accepted on the day of the class only. A course manual and certificate of completion will be provided to attendees. Certifications are valid for two years from date of issuance. This same course will be offered again on Thursday, June 15, 8 a.m. to 5 p.m., at the Hedrick House, 1407 Creekview Drive. Pre–registration for that course ends Monday, June 12.