It's not perfect but it gives teachers an opportunity to see their students' work in a synchronous or asynchronous setting. This allows teachers to have a better idea of where each student is in the lesson and allows them to respond to them as the students are able to get the work submitted.
Student interaction - Pear Deck gives you a leg up for synchronous or asynchronous learning. The students can share their ideas and reactions right on the slide. From the perspective of a math teacher this is unique, instead of seeing the final answer we can see the work that led them there.
Compatibility - Pear Deck is easily synchronized with the Google Suite and requires no alternate email or passwords for the students to memorize. It is set up to port directly to Google Slides and Google Classroom
Assessment - Pear Deck makes it easy to collect and record data from your students. The quantitative data is easily viewed and synthesized to help improve teacher practices. Qualitative data is accessible through the add-on as well, allowing you to ask students for the work behind their answers.
Differentiation - Pear Deck allows you to see everyones work at once which allows you to decide how to differentiate in the future. It also is self-paced which lends itself nicely to students who learn at different paces.
Student Interaction - It is difficult for students to write neatly in the small space provided on the slides, so the work they turn in is often messy. When students type answers, they cannot input equations or mathematical characters.
Compatibility - The free version of Pear Deck is missing important features such as the Draggable, the "draw" feature that allows students to show their work, or the ability to host live sessions. The Premium version starts at $150/year for an individual account, which essentially means you have to convince admin to buy it for you.
Assessment - There is no way to provide students with feedback through Pear Deck and you can't sort responses by student.