So the 10% of teacher practice that is visible is what we can see with our own eyes when we walk into the classroom. What's written on the board What students are doing. The interactions among students, the interactions between the teacher and the students and perhaps their lesson plans, or you know, objectives for the day, if they have that visible or they share that with us. We can also see the teacher's body language, you know, how they're interacting with the students positively, negatively, or kind of neither, right? Or interactions that may occur if a student is having a discipline issue. But then the 90% that's not visible is the planning that goes into preparing for the lesson, its resources that teachers might have searched for or gotten from other colleagues to implement in this lesson. It is the fact that the teacher may be thinking this lesson is totally bombing and here is the administrator observing me, right? It's also, you know, the student that's having the discipline issue and what happens to that student prior to coming to class, or maybe the relationship between the teacher and the student that they were not aware of the nuances there. It could also be some of the differentiation used in the lesson. Some of the groups that the teacher is differentiating with if we're not aware of some of the structures in the grouping that the teacher has set together that way.