09/06/2012 11:46 am ET Updated Sep 06, 2012

Rya, Girl With Cerebral Palsy, Goes To School For The First Time (PHOTOS)

Shine Photography By Karen

In September of 2009, one father received news no parent ever wants to hear: His 4-month-old daughter had cerebral palsy.

Writing on his Wordpress blog, Jon, also known as Reddit user "pkcs11," recalls the day he learned his daughter Rya was born with half of a brain.

"After seeing the MRI, I knew that something was horribly wrong. Nearly the entire right hemisphere was missing," Jon wrote at the time. "We are, in short, devastated. I go from being happy to have a beautiful baby girl and being rendered a sobbing jangle of nerves. Not sure where to go from here and we’re all feeling a little lost."

For the next two years, Jon would document the daily struggles, and triumphs, that come from living with a child with cerebral palsy. Through his blog and periodic updates on Reddit, Jon shared with the world Rya's adorable smile and her very first steps.

And on Tuesday, on World Cerebral Palsy Day, Jon was proud to post a new milestone: Rya's first day of school.

Jon's Reddit post garnered many positive comments, with one user calling the story "absolutely beautiful," and another writing, "I feel so incredibly proud and I don't even know these people, or that girl. This made my entire day."

According to United Cerebral Palsy, about 764,000 kids and adults in the U.S. have CP, and 8,000 babies and infants are diagnosed with it each year. Worldwide, 15,000,000 people have been diagnosed with the disorder.

While not curable, cerebral palsy is manageable through long-term care and rehabilitation efforts, according to the Mayo Clinic.

In 2011, the Daily Mail documented the inspiring first steps of another child with CP, Finley Rosbotham, who like Rya, was diagnosed at 4 months after doctors discovered that a large part of the left side of his brain was missing.

Finley slowly learned to crawl by chasing a Thomas The Tank train. The 2-year-old amazed medics, who credited "extraordinary parenting" for the boy's progress.

Speaking with the outlet, Finley's mother, Kelly Rosbotham, told mothers to stay optimistic.

"If I could say to other mums in my position, never take for granted what the doctors say," Robotham said. "Because anything can change and you will see the benefits of putting all your energy and efforts into it and when the doctors say 'no' you can still find a way. It shows what can be achieved."

Rya Girl With Cerebral Palsy Goes To School For First Time