2Bruce J. Biddle& David C. Berliner.What Research Says About Small Classesand Their Effects. Winter 2002.
3Chloe Bullard. Qualified Teachers forall California Students: Current Issues in Recruitment, Retention, Preparation, and Professional Development. California Research Bureau. August 1998.
4Motivating teachers to improve instruction [EB/OL].http://www.osba.org/lrelams/teacherq/motivate.htm