Effective professional development enhances teachers' instructional skills and in turn improves students' learning. This study adopts a multilevel perspective to investigate the interplay of self-directed learning (SDL), professional self-awareness, and the supportive organizational climate in terms of their effects on the professional development of high school teachers in Taiwan
IntroductionEducation is an important indicator for assessing a nation's competitive advantage. Educational reform has been viewed by developed countries as essential for ensuring continuous improvement of educational quality and thus maintaining the nation's competitive advantage through education (Ministry of Education, 2011). Teachers thus play a critical role in cultivating talent for the nation. In recent years, apart from a signifi cant drop in the birth rate in Taiwan, the imbalance in the supply and demand of teachers has become a pressing issue for Taiwan' s government. The government has actively promoted the importance of professional development for teachers, aiming to enhance overall teaching quality and to establish criteria for getting rid of unqualifi ed teachers. In addition, the K-12 education was listed as one of the signifi cant reforms implemented by Taiwan' s government in 2013 and professional development of teachers has been proposed among the 29 relevant action plans implemented in this reform program. The Ministry of Education in Taiwan encourages teachers to participate in various kinds of professional development programs in order to increase their professional knowledge, skills, and abilities. In the past, high school teachers in Taiwan were not generally mandated to take part in professional development, and the percentage of teachers' voluntary participation in professional development was relatively low, about only 29% of the total high school teacher population in 2012 (Teacher Evaluation for Professional Development, 2012). Thus, an investigation of factors affecting teachers' voluntary involvement in professional development will greatly help ensure the success of educational reform in Taiwan.In Taiwan' s current educational system, there is no regulation that stipulates the obligation of teachers to participate in professional development. In addition, teachers who are willing to participate in professional development activities have to get offi cial approval from the school administration in advance. It was found that teachers with a higher level of self-directed learning (SDL) and self-awareness tend to participate in professional development activities with greater enthusiasm (Brigley, Young, Littlejohns, & McEwen, 1997;Choi & Jacobs, 2011;Mushayikwa & Lubben, 2009). Their motivation to participate will be greatly strengthened given perceived support from the school administration (Mushayikwa & Lubben, 2009). In fact, teachers' characteristics and organizational variables (e.g., SDL, professional self-awareness, and a supportive organizational climate) are pivotal to encouraging teachers to partic...