References

1. Olson, L. (2000, January 13). Finding and keeping competent teachers. Quality Counts 2000. Education Week on the Web. [On-line] Available: www.edweek.org.
   
   
2. Hough, D. (2000). Teacher supply and demand in Missouri, 1999-2000. Springfield, MO: Southwest Missouri State University.
   
   
3. Ingersoll, R. M. (1999). The problem of underqualified teacher in American secondary schools. Educational Researchers, 28(2), 26-37.