FAIRLESS HILLS, Pa. – Bucks County Technical High School freshman Jake Wesley didn’t appreciate being put on the sidelines, so he did something about it.

The 14-year-old uses a wheelchair because he is disabled with Duchenne Muscular Dystrophy, so he wasn’t particularly surprised with his school sent him a letter recently informing him that he’s “medically exempt” from his school’s annual Field Day, Fox 43 reports.

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But the letter also stated that Wesley would be forced to wear a special, differently colored wristband because he’s prohibited from participating in Field Day activities, and he would face discipline if he tries to join in.

“Your child is welcome to serve as a field day judge, score keeper or in some other non-active capacity on field day,” according to the letter, sent May 26. “Each medically exempt student will be directed to the nurse’s office on the morning of Field Day where he/she will receive a red wristband identifying them as a non-active field day participant.”

“When I got the letter I was pretty mad,” Wesley told the news site. “I don’t think people in wheelchairs or with any disease should be excluded from activities.”

So Wesley decided to let school officials know exactly how he feels, and employed the help of social media to send the message.

Wesley tweeted about the discrimination last Friday, along with a picture of the letter he received.

“I’m jake I attend bucks county technical high school and received this letter that I believe is discrimination,” Wesley posted to Twitter.

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He also messaged disability groups to get the word out.

“He’s always been a strong advocate for himself and for other kids with disabilities,” Keith Wesley, Jake’s father, told CBS Philly.

The response from school officials to Wesley’s social media post and the backlash it created was immediate, Jake Wesley told the Newtown Patch. District officials sent an apology to all 60 medically exempt students, and invited them to take part in the festivities.

“On behalf of our school, I wish to apologize for this letter. The letter was sent in error. It was a mistake,” administrative director Leon Poeske wrote in the apology letter, adding that the intent was to protect disabled students.

“However, the way we went about this was not appropriate and we know we must change our procedures,” the letter read. “Therefore, students who have a medical or health condition will not be identified by a different wristband color. Also we will make sure that there are games and activities for all students.”

Field day starts tomorrow, and Wesley told Patch he plans on participating.

Keith Wesley said he’s quite proud of his son.

“Yeah, he’s the man,” the father told CBS Philly.