Do not get out of your seat without permission. I expect you to consider carefully all absences from chemistry class. Remember that field trips are not counted as absences. You are required to complete your work before the field trip or to have all assignments ready when you return to class. Attendance in chemistry is extremely important.
Chemical knowledge is cumulative.
Participation in today's activities is often essential to understanding tomorrow's work. Classwork that is done out of order is often less meaningful to students. Some assignments and opportunities are almost meaningless out of context and out of order. Chemistry knowledge and understanding is more than a list of completed assignments and tests. When you are absent, you will miss subtle links between the facts and the problems that lead to real understanding.