A teacher's concern can include absenteeism, CLASS size, CLASS='font-bold underline-link hover:text-barberry-yellow'>TENURE, and lesson plans. Absenteeism is when students are not present in CLASS, which can affect the learning environment. CLASS size is the number of students in a CLASS, which can affect the teacher's ability to give individual attention to each student. CLASS='font-bold underline-link hover:text-barberry-yellow'>TENURE is the length of time a teacher has been employed at a school, which can affect their job security. Lastly, lesson plans are the plans a teacher creates for their classes, which can affect the quality of instruction they provide.