Limeades for Learning(SM) Continues Into Second Year; SONIC(R) Commits More Than Half a Million Dollar Donation

OKLAHOMA CITY, OK--(Marketwire - May 24, 2010) -  SONIC®, America's Drive-In® (NASDAQ: SONC) and DonorsChoose.org are working together for a second year to support public school classrooms through the Limeades for Learning(SM) program. Last year, SONIC and its franchisee partners donated more than $635,000 and helped fund 1,457 public school teacher projects across the country. By October 2010, SONIC will have donated more than $1 million in supplies and learning materials to inspire learning in the classroom.

"SONIC was able to impact thousands of teachers and students through Limeades for Learning last year," said Clifford Hudson, chairman and chief executive officer for Sonic Corp. "We're excited to offer the program for a second year, and with no purchase necessary this year, we hope to broaden our reach and impact even more public school classrooms."

Aug. 30 through Sept. 30, anyone can go online every day to LimeadesForLearning.com and vote for their favorite public school teacher's classroom project by entering a valid e-mail address. SONIC will fund at least $100,000 toward projects with the most votes each Friday for five weeks during the campaign. Though the voting campaign doesn't begin until late August, teachers are encouraged to visit LimeadesForLearning.com to register their project and learn more about Limeades for Learning and SONIC's partnership with DonorsChoose.org.

"Working with a community partner like SONIC allows DonorsChoose.org to reach even more teachers that need resources in their classrooms," said Charles Best, founder and CEO of DonorsChoose.org. "We're excited SONIC has committed to Limeades for Learning for a second year and another half a million dollars."

About SONIC Drive-In
SONIC, America's Drive-In (NASDAQ: SONC) started as a hamburger and root beer stand in 1953 in Shawnee, Okla., called Top Hat Drive-In, and then changed its name to SONIC in 1959. The first drive-in to adopt the SONIC name is still serving customers in Stillwater, Okla. As the nation's largest chain of drive-in restaurants, SONIC has more than 3,500 drive-ins coast to coast and serves approximately 3 million customers every day. With more drink combinations than any other quick-service restaurant -- more than 168,000 -- SONIC is Your Ultimate Drink Stop^®. For more information about Sonic Corp. and its subsidiaries, visit SONIC at www.sonicdrivein.com. Through Limeades for Learning(SM), SONIC and its franchise partners have donated more than $638,000 to public school classrooms in local communities across the country. Visit www.limeadesforlearning.com to learn more about SONIC's commitment to education.

About DonorsChoose.org
Founded in 2000, DonorsChoose.org is a nonprofit website where public school teachers describe specific educational projects for their students, and donors can choose the projects they want to support. After completing a project, the donor hears back from the classroom they supported in the form of photographs and teacher thank-you letters. To date, 127,000 public and charter school teachers have used the site to secure funding for $52.8 million in books, art supplies, technology, and other resources that their students need to learn. Through DonorsChoose.org, individuals from all walks of life have helped 3.2 million students.