Teaching can be a thankless job at times, but one group of students from the College of New Jersey recently found the perfect way to express their gratitude to their professor.

Earlier this month, Adam Shrager logged onto Zoom to teach his statistics class and was surprised to see that all of his students had turned off the video function.

“Usually, in this class, solidly 90% of the students keep their cameras on the entire class. Sometimes they even send me a note apologizing that they will keep their camera off during a particular class for one reason or another,” the 54-year-old told TODAY. “Logging in and seeing no faces at all was very strange. All I could think was that my internet was slow or something.”

This was the last class before the final exam and Shrager, who works as a high school teacher by day, was concerned that he and his students would end the semester on the wrong note.