Oklahoma mom 'embarrassed' that her child's textbook once belonged to Blake Shelton

Don't take it too personally, Blake – this isn't really about you.

As Oklahoma mother Shelly Bryan Parker shared on Facebook this week, she was "embarrassed" to find that a textbook she believes was once used by singer Blake Shelton in the 1980s is the same book her young daughter is using in school today. Shelton originally hails from Ada, the same town that Parker and her daughter call home.

The problem for Parker isn't Shelton, but Shelton's age – or, rather, the age of her child's textbook. 

Related: More of the walkout

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Oklahoma, Kentucky teachers walk out over pay
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Oklahoma, Kentucky teachers walk out over pay
FRANKFORT, KY - APRIL 2: Thousands of public school teachers and their supporters protest against a pension reform bill at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Photo by Bill Pugliano/Getty Images)
OKLAHOMA CITY, OK - APRIL 2: Elvin Lee, a teacher from Lawton, Oklahoma joints the teachers' rally at the state capitol on April 2, 2018 in Oklahoma City, Oklahoma. Last week, Gov. Mary Fallin said teachers should come to the capitol to thank her for the raise. Thousands of teachers and supporters are scheduled to rally Monday at the state Capitol calling for higher wages and increased school funding. Teachers are walking off the job after a $6,100 pay raise was rushed through the Legislature and signed into law by Gov. Mary Fallin. (Photo by J Pat Carter/Getty Images)
Oklahoma teachers rally outside the state Capitol in Oklahoma City, Oklahoma, U.S., April 2, 2018. REUTERS/Lenzy Krehbiel-Burton
Thousands of Kentucky school teachers marched Monday, April 2, 2018 from the Kentucky Education Association's headquarters to the State Capitol in Frankfort, Ky. to protest legislative changes to their pensions and education cuts. Public schools in all 120 Kentucky counties were closed Monday, either to join in the protest or because of spring break. (Charles Bertram/Lexington Herald-Leader/TNS via Getty Images)
Oklahoma teachers rally outside the state Capitol in Oklahoma City, Oklahoma, U.S., April 2, 2018. REUTERS/Lenzy Krehbiel-Burton
Oklahoma teachers rally outside the state Capitol in Oklahoma City, Oklahoma, U.S., April 2, 2018. REUTERS/Lenzy Krehbiel-Burton
FRANKFORT, KY - APRIL 2: Public school teachers and their supporters protest against a pension reform bill at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Photo by Bill Pugliano/Getty Images)
Oklahoma teachers rally outside the state Capitol in Oklahoma City, Oklahoma, U.S., April 2, 2018. REUTERS/Lenzy Krehbiel-Burton
Oklahoma teachers rally outside the state Capitol in Oklahoma City, Oklahoma, U.S., April 2, 2018. REUTERS/Lenzy Krehbiel-Burton
FRANKFORT, KY - APRIL 2: Public school teachers and their supporters protest against a pension reform bill outside the senate chambers at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Photo by Bill Pugliano/Getty Images)
OKLAHOMA CITY, OK - APRIL 2: Natalie Armstrong (left) and her two daughters Payton and Payzlyn, along with her mother Katrina Sinor rally at the state capitol on April 2, 2018 in Oklahoma City, Oklahoma. Thousands of teachers and supporters are scheduled to rally Monday at the state Capitol calling for higher wages and better school funding. Armstrong said she has spent $3,000 this year for school supplies Teachers are walking off the job after a $6,100 pay raise was rushed through the Legislature and signed into law by Gov. Mary Fallin. (Photo by J Pat Carter/Getty Images)
OKLAHOMA CITY, OK - APRIL 2: Oklahoma teachers rally at the state capitol on April 2, 2018 in Oklahoma City, Oklahoma. Thousands of teachers and supporters are scheduled to rally Monday at the state Capitol calling for higher wages and better school funding. Teachers are walking off the job after a $6,100 pay raise was rushed through the Legislature and signed into law by Gov. Mary Fallin. (Photo by J Pat Carter/Getty Images)
Thousands of Kentucky teachers rallied at the state Capitol in Frankfort, Ky. on Monday, April 2, 2018. (Alex Slitz/Lexington Herald-Leader/TNS via Getty Images)
FRANKFORT, KY - APRIL 2: Public school teachers and their supporters protest against a pension reform bill outside the senate chambers at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Photo by Bill Pugliano/Getty Images)
FRANKFORT, KY - APRIL 2: Thousands of public school teachers and their supporters protest against a pension reform bill at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Photo by Bill Pugliano/Getty Images)
FRANKFORT, KY - APRIL 2: Thousands of public school teachers and their supporters protest against a pension reform bill at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Bill Pugliano/Getty Images)
FRANKFORT, KY - APRIL 2: Public school teachers and their supporters protest against a pension reform bill outside the senate chambers at the Kentucky State Capitol April 2, 2018 in Frankfort, Kentucky. The teachers are calling for higher wages and are demanding that Kentucky Gov. Matt Bevin veto a bill that overhauls their pension plan. (Photo by Bill Pugliano/Getty Images)
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"I’m 40 and these people are my age!!!" she wrote. "Thank you to every teacher/parent/support staffer/etc. for fighting for my kids education!!! Don’t give up until education is FULLY FUNDED!!!!"

According to People, Parker is a former teacher herself. "I said, 'No, that can't be,'" she told the publication. "I can't believe these books are so old. When I was in school, I wasn't using books that were 40 years old." 

Parker shared the post on Wednesday amid Oklahoma's five-day teacher walkout protesting the repeal of state legislation that could aid school funding. 

CNN reports that the walkout will continue into next week, unless lawmakers "pass a bill ending the capital gains deduction and the governor must veto the repeal of a hotel-motel tax bill," both of which teachers say affect funding.

WATCH: This after-school program teaches kids to make robots

Related: See the star out and about 

23 PHOTOS
Blake Shelton out and about
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Blake Shelton out and about
NASHVILLE, TN - NOVEMBER 03: Singer-songwriter Blake Shelton attends Pandora Sounds Like You: Country on November 3, 2017 in Nashville, Tennessee. (Photo by John Shearer/Getty Images for Pandora)
NASHVILLE, TN - NOVEMBER 03: Singer-songwriter Blake Shelton performs onstage for Pandora Sounds Like You: Country on November 3, 2017 in Nashville, Tennessee. (Photo by John Shearer/Getty Images for Pandora)
NEW YORK, NY - NOVEMBER 02: Singer/songwriter Blake Shelton attends the BS By Blake Shelton Launch at Macy's Herald Square on November 2, 2017 in New York City. (Photo by Steve Zak Photography/FilmMagic)
LATE NIGHT WITH SETH MEYERS -- Episode 601 -- Pictured: Blake Shelton talks with host Seth Meyers during an interview on November 1, 2017 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - OCTOBER 31: Blake Shelton and Hoda Kotb perform during Today's Halloween Extravaganza 2017 at Rockefeller Plaza on October 31, 2017 in New York City. (Photo by Nicholas Hunt/Getty Images)
NEW YORK, NY - OCTOBER 31: Blake Shelton performs during Today's Halloween Extravaganza 2017 at Rockefeller Plaza on October 31, 2017 in New York City. (Photo by Nicholas Hunt/Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0764 -- Pictured: Musician Blake Shelton during an interview on October 30, 2017 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
TISHOMINGO, OK - SEPTEMBER 29: Blake Shelton performs during a free Opry style concert on Main Street outside of new restaurant and bar, Ole Red, opened by Shelton and Ryman Hospitality Partners on September 30, 2017 in Tishomingo, Oklahoma. (Photo by Erika Goldring/Getty Images for Ryman Hospitality Properties Inc)
THE VOICE -- 'Promo' -- Pictured: Blake Shelton -- (Photo by: Colleen Hayes/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Battle Rounds' -- Pictured: Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
STATE COLLEGE, PA - JULY 08: Singer/songwriter Blake Shelton performs during Happy Valley Jam 2017 in Beaver Stadium on the campus of Penn State University July 8, 2017 in State College, Pennsylvania. (Photo by Rick Diamond/Getty Images for Happy Valley Jam)
THE VOICE -- 'Blind Auditions' -- Pictured: (l-r) Adam Levine, Blake Shelton, Jennifer Hudson, Miley Cyrus -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
NASHVILLE, TN - JUNE 09: (EDITORIAL USE ONLY) Blake Shelton performs during the 2017 CMA Music Festival on June 9, 2017 in Nashville, Tennessee. (Photo by Erika Goldring/WireImage)
NASHVILLE, TN - JUNE 07: Blake Shelton performs onstage at the 2017 CMT Music Awards at the Music City Center on June 7, 2017 in Nashville, Tennessee. (Photo by Kevin Mazur/WireImage)
NASHVILLE, TN - JUNE 06: Blake Shelton welcomes Smithworks Vodka to the heart of counrty music on June 6, 2017 in Nashville, Tennessee. (Photo by Erika Goldring/Getty Images for Smithworks Vodka)
THE VOICE -- 'Live Finale' Episode 1219A -- Pictured: Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
LAS VEGAS, CA - MAY 21: Singer-songwriter Blake Shelton winner of Top Country Artist poses in the press room at the 2017 Billboard Music Awards at T-Mobile Arena on May 21, 2017 in Las Vegas, Nevada. (Photo by Jeffrey Mayer/WireImage)
LAS VEGAS, NV - MAY 21: Recording artists Blake Shelton (L) and Gwen Stefani attend the 2017 Billboard Music Awards at T-Mobile Arena on May 21, 2017 in Las Vegas, Nevada. (Photo by Kevin Mazur/BBMA2017/Getty Images for dcp)
THE VOICE -- 'Live Top 10' Episode: 1217A -- Pictured: Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Live Top 10' Episode: 1217B -- Pictured: (l-r) Aliyah Moulden, Blake Shelton, TSoul, Lauren Duski -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
UNIVERSAL CITY, CA - MAY 01: Alicia Keys and Blake Shelton attend 'The Voice' Season 12 coaches red carpet at Universal Studios Hollywood on May 1, 2017 in Universal City, California. (Photo by Tibrina Hobson/Getty Images For NBC)
AUBURN, AL - APRIL 22: Stacy Brown - Co-Founder of Chicken Salad Chick Foundation and Blake Shelton attend Music And Miracles Superfest benefitting Chicken Salas Chick Foundation at Jordan-Hare Stadium on April 22, 2017 in Auburn, Alabama. (Photo by Rick Diamond/Getty Images for Basis Entertainment)
THE VOICE -- 'Top 12 Reality' -- Pictured: (l-r) Blake Shelton, Shania Twain -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
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