At the age of 91, English professor Charles Krohn has become an online star after his daughter posted a video online of her father online teaching during the covid-19 pandemic.
Earlier this month, the professor's daughter, Julia Krohn, posted a video online of her father navigating online learning.
Krohn has been an English professor at The University of St Thomas for over 50 years.
His daughter also took a picture and posted it on Facebook where thousands shared and commented.
Many were former students of her father's, including students dating back to the 1960s.
"[There were] all these memories of him in the classroom and how they may not remember much about St Thomas, but they remember so much about Professor Krohn ... that he's the most kind-hearted, most compassionate person you'll ever meet," Julia told Good Morning America."
Krohn and his wife Chesley have been married for 54 years and have four children and six grandchildren.
"He's an actor as well so that has gone hand and hand in his teaching," Julia said. "He's just so lively and it's like watching a performance."
Houston's University of St Thomas has adopted an e-learning model amid Covid-19.
After having technology issues, Julia invited her dad to her house so he could use her computer.
Julia said she hadn't seen her dad teach in 20 years.
"The fact that [he's teaching] virtually and still engaging and so smart and so quick ... it was just this beautiful moment that I just had to capture," she added.
After reading every single Facebook comment, Julia said her father was brought to tears.
"Professor Krohn was my UST English professor in Fall '92 and Spring '93," one former student wrote.
"And right now he is my daughter's UST English professor."
"He taught me so much & opened up a new world of literature," another commented.
"His passion and dedication were not unnoticed. I'll never forget my experience w/ Krohn."
Krohn's computer is now fixed and his daughter said he hasn't missed a beat.
‘Mum had lived and died with this secret,’ says writer Mary Garden.