Learn CPR, see a concert and stock up on school supplies this week in Spring and Klein. Spring ISD holds its regular board of trustees meeting on Tuesday at 7 p.m. in the board room of the Gordon M. Leadership Center, 16717 Ella Blvd., Houston. 281-891-6000. www.springisd.org Lorraine Hibbert leads a CPR course hosted by Precinct 4 at the Mangum-Howell Center on Wednesday. Hibbert is a certified instructor with 20 years of experience as a registered nurse and has been a CPR instructor for the American Heart Association for four years. $15. 9 a.m.-1 p.m. Mangum-Howell Center, 2500 Frick Road, Houston. 281-591-7830. www.hcp4.net/community/communitycenters Performer Michael Hix headlines Precinct 4's 16th annual opry on Friday at the Humble Civic Center. Candy, popcorn and soft drinks are available at the event. Transportation from 11 locations is provided for individuals 50 years and older. $10-$15. 6 p.m. Humble Civic Center, 8233 Will Clayton Parkway, Humble. 281-893-3726. www.hcp4.net/sap/events In preparation for the upcoming school year, tax-free weekend starts on Friday and lasts through Sunday. During this time, most clothing, footwear, school supplies and backpacks are exempt from sales tax. Check out a list of stores that sell teacher supplies here.