As used in this article, the following terms shall have the following meanings:

(1) BOARD. Each county or city board of education; the Board of Trustees of the Alabama Institute for Deaf and Blind; the Alabama Youth Services Board in its capacity as the Board of Education for the Youth Services School District; the Board of Directors of the Alabama School of Fine Arts; and the Board of Directors of the Alabama School of Mathematics and Science.

(2) GROWTH. The amount by which projected revenue in the Education Trust Fund for the fiscal year for which appropriations for teacher salaries are being made is anticipated to exceed projected revenue for the prior fiscal year. For purposes of calculating growth, prior fiscal year projected revenue shall exclude actual beginning of year balance and projected end of year unappropriated balance. For purposes of calculating growth, projected revenue for the fiscal year for which appropriations for teacher salaries are being made shall include all revenue projected at the time the growth calculation is made plus any projected unappropriated beginning balance up to $50,000,000, excluding any funds appropriated or anticipated to be transferred to the Proration Prevention Account. Growth shall not include revenue from a. a revenue source not in existence on May 24, 2000, or b. an increase in the rate or a substantial adjustment of the base of a revenue source in existence on May 24, 2000. For purposes of this section, "substantial" shall mean an amount estimated by the Legislative Fiscal Officer and the state Finance Director which is in excess of $500,000 for the year in which the appropriations are to be made.

(3) PRIOR FISCAL YEAR. The fiscal year immediately prior to the fiscal year for which appropriations for teacher salaries are being made.

(4) TEACHER. Any full-time public school teacher in Alabama who is an employee of a board and who is required to be certificated by the State Board of Education, including, but not limited to, counselors, librarians, Science in Motion teachers, supervisors, administrators (excluding superintendents and their professional executive assistants), teachers at the Department of Youth Services, the Alabama School of Mathematics and Science, and the Alabama School of Fine Arts.