more than 150 million students and educators, up from 40 million early last year. And Zoom Video Communications says it has provided free services during the pandemic to more than 125,000 schools in 25 countries.

But whether tools that teachers have come to rely on for remote learning can maintain their popularity will hinge on how useful the apps are in the classroom.

Nesi Harold, an eighth-grade science teacher in the Houston area, have used features on the app to poll students, create quizzes or ask students to use a drawing tool to sketch the solar system — digital tools that work for both live classroom and remote instruction.

“It allows me to broadcast the lesson to all of my learners, no matter where they are,” said Ms. Harold, who simultaneously teaches in-person and remote students.

one complaint: She can’t store more than a few lessons at a time on Nearpod because her school hasn’t bought a license. “It’s still pricey,” she said.

The future in education is less clear for enterprise services, like Zoom, that were designed for business use and adopted by schools out of pandemic necessity.

In an email, Kelly Steckelberg, Zoom’s chief financial officer, said she expected educational institutions would invest in “new ways to virtually communicate” beyond remote teaching — such as using Zoom for Parent Teacher Association meetings, school board meetings and parent-teacher conferences.

Mr. Chasen, the ed-tech entrepreneur, is counting on it. He recently founded Class Technologies, a start-up that offers online course management tools — like attendance-taking and grading features — for educators and corporate trainers holding live classes on Zoom. The company has raised $46 million from investors including Bill Tai, one of the earliest backers of Zoom.

“I’m not coming up with some new advanced A.I. methodology,” Mr. Chasen said of his new app for video classrooms. “You know what teachers needed? They needed the ability to hand out work in class, give a quiz and grade it.”

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