Traditional grading of assignments and speaking to the class as a group will not cut it.
Teachers need to talk to their students individually, see what they know and understand.
Then you can see how they have grown. The factory model of education is not equitable
and a proven failure for most, except math teachers. People are individuals, and students are people, treat them that way!
Teachers need to be progressive.
That means keeping out of the classroom:
Traditional grading of assignments that force everyone to perform and value the same thing.
Progressive teachers talk to their students and find out what is important to them and help the students do projects in the teacher's subject area, just like graduate school is supposed to be.
Subject area integrated Project Based Learning is when the student does their research into an area that they are interested in investigating or tries an activity or performance. Then the student authentically produces a project or performance that shows what they have learned and what is important to them.
What I have learned is that teachers need to be progressive to use PBL. If you use traditional metrics and rubrics that value what the teacher feels is essential, student success is measured in a limited way. That idea that all students need to learn the same thing the same way goes against the rationale of implementing PBL.
PBL is an authentic and individualized method to show the transformation of knowledge that individual students make within their education. Students can't share the same aha moment with their teachers or peers; they need to have their own.