Basic Tissue Types. All of the various tissues of the human body can be categorized into four basic tissue types. All organs are built of these four tissues, which have consistent characteristics and arrangements from organ to organ. Thus an appreciation of the major features of these four basic tissue types can greatly simplify your understanding of the cellular composition of the many organ systems. 1  OVERVIEW.
Definition of session for English Language Learners : a period of time that is used to do a particular activity : a formal meeting or series of meetings of a group of people (such as a court of law or legislature)
Average Daily Attendance: The percentage of a. schoolâs student body that attends on a typical day. The definition is the same nationwide, but does not. provide student-level data. Truancy: A measure of how many students miss. school without an excuse. The definition varies from. state to state. Chronic absence: A measure of how many students. miss a certain percentage or number of days, including excused and unexcused absences and. suspensions. Researchers often track 10 percent of. the school year, but there is no common definition. among states.