High-dosage tutoring is en vogue among those seeking to help students rapidly make up for learning lost during the pandemic.

With a significant research base behind the efficacy of tutoring, that’s driven widespread interest in schools using federal relief dollars on such tutoring solutions. And that in turn has fueled spending on a variety of businesses offering tutoring solutions.

Among the leaders in this wave has been Nerdy and its flagship business Varsity Tutors.

Varsity Tutors started as an online platform to help individuals find in-person tutoring. In 2013, it launched its “Live Learning Platform,” to help people access live tutoring online. Today it offers tutoring in 3,000 different subjects across four different learning formats—such as tutoring and online classes.