She proudly posted notes and photos on her Twitter account about her school's activities.

"Setting up for the Sandy Hook nonfiction book preview for staff ... Common Core, here we come!" she wrote on Thursday, her most recent tweet. A photo depicted several children's books, including "Alligator or Crocodile? How Do You Know?"

Another photo shows a choir of boys and girls dressed in white shirts and black pants or skirts being led by the music teacher. The audience was all students.

"Sandy Hook students enjoy the rehearsal for our 4th grade winter concert - a talented group led by Maryrose Kristopik!" Hochsprung tweeted Wednesday. Kristopik is listed as music teacher on the school's website.

On her principal's page of the school website, Hochsprung emphasizes the school's "rich history of establishing high expectations and sustaining strong academic performance."

"Our Responsive Classroom approach focuses on the benefits of a climate of kindness and respect where all community members feel accepted, important, and secure," Hochsprung wrote.

In her two years at Sandy Hook, the principal came across as a "very well-liked, compassionate woman" who was "extremely helpful," said Aimee Seaver, a mother of a first grader.

Hochsprung brought positive energy, sincerity and a strong work ethic to the job -- qualities that will be sorely missed, added Seaver.

"I never saw her without a smile," Seaver said. "I believe she had the children's best intentions (in mind) all the time. She was always looking out for them."