Teaching observation is one factor in total evaluation of academic performance of the teaching staff. At least once during each academic semester, non-tenured and non-certificated members of the teaching staff shall be observed for a full classroom period. One observation shall take place during any scheduled class during the first ten weeks of a semester. The employee shall be given no less than 24 hours of prior notice of observation. Tenured and certificated members of the teaching staff may be observed once each semester. The observation is followed by a written report, an opportunity to respond in writing, and a post-observation conference. After ten (10) semesters of service, teaching observation for adjunct personnel shall be held at the request of the chairperson or the adjunct.