Have them check out the following (and pass the info along to parents and to students who are considering or are already education majors):
Association of American Educators
25201 Paseo de Alicia, Suite 104
Laguna Hills, CA 92653
Phone: 949-595-7979 or 1-800-704-7799
Fax: 949-595-7970
Email: info@aaeteachers.org
Website: www.aaeteachers.org
Please note that the AAE is not a union. It is a professional association. Annual dues are $125 per year for teachers (includes $2 Million liability insurance - one of the reasons teachers join the NEA or AFT is for liability insurance). Student, retired educator, and associate/support memberships are $25 per year.
Here are some links that will be of interest to teachers (and parents):
"Grading the NEA - What Every Teacher Needs to Know About The National Education Association: A Special Report" by Perry L. Glanzer, Ph.D. & Travis R. Pardo (http://www.family.org/gradingthenea/news/a0012243.html)
"The Impact of Unionism on the Quality of Public Education" by David Denholm (http://www.psrf.org/doc/art2.html)
"Teacher Unions and Parent Involvement" (http://www.educationpolicy.org/EPIseries/parent-bklt.htm)