Alliance Report on teacher attrition cited in article, “Study: Unhappy teachers cost NJ up to $61M”The drain is costing billions, according to study results released this summer by the Alliance for Excellent Education, a reform advocacy group. Experts say the bleeding can be stopped by stepping up career development opportunities for educators and changing a negative public perception of teachers. Last year, 3,494 teachers left New Jersey's pension fund for educators, according to data supplied by the New Jersey Education Association. In eight of the last nine years, between 3,000 and 4,400 teachers left the pension fund in a given year. In 2011, about 6,590 teachers left the profession, according to the data.