At the beginning of each trimester students are given a checklist to track their own mastery. As they progress through the lessons, they mark off what they have completed, in addition to the grade they received on each lesson. This acts as planner, letting students know at any given moment what they have completed, and what is left for them to learn to finish the trimester.
We don't use text books in our class, we make them. Each student is given a binder at the beginning of the year. The binder becomes a reference book for the students as they fill it up with the lessons they have completed. Many standard textbooks have become a diluted hodepdoge of information, hard for most students (and even myself) to decipher. This binder allows me to create a resource tailored to my students.
Chemistry is a combination of the comprehension of scientific content and the application of mathematics to those concepts. My students have to be prepared to think deeply about difficult concepts the minute they step into my room. Starting the class with a relevant "Catalyst" helps them initiate their own thinking processes in preparation for a productive day in the same way that biological enzymes catalyze chemical reactions. During The Catalyst, I model my thinking process for how to approach a mathematical problem by having my students identify the key steps in the calculation and establish a foundation that students who struggle with math can fall back on when they're confused.
In the traditional classroom, time is constant and understanding is variable from student to student. The Flipped Mastery model inverts the traditional relationship between time and understanding, letting understanding be the constant and time be variable. All of my students are held to the same high standards, but they master standards at a pace they feel comfortable with and are ready for. Initially, many of my students are confused about what a self-paced mastery-based class is all about, so my co-teacher and I find it helpful to introduce the concept to our students in a very strategic and explicit way at the beginning of each school year.