This paper is the 10th in a series of biannual surveys of Texas public school teachers that began in 1980 to examine teacher characteristics (including their feelings about moonlighting). Participating teachers were selected using a computerized systematic sample from a population of 100,000 members of the Texas State Teachers Association. For the 1998 survey, researchers mailed questionnaires to 699 teachers, and 312 teachers responded with usable surveys. Results indicate that the average Texas teacher is a 45-year-old female, is making a salary of $34,572, is married with a working spouse, has a bachelor's degree, is not the family breadwinner, teaches elementary school in a suburban district, and has 16.2 years of experience. About 40 percent of the teachers are seriously considering leaving the profession. Around 35 percent work in the summer making $2,526, and 34 percent moonlight during the regular school year making $3,440 while working 11.5 hours per week. Nearly 90 percent of the teachers pay health insurance in the amount of $144 per month. Over 60 percent of the teachers believe that moonlighting is detrimental and would like to quit while believing that the quality of teaching is better than it was 5 years ago. (Contains 4 figures, 5 tables, and 7 references.) (SM)