“…As early as 1984, the National Association for Core Curriculum examined over eighty studies on the effectiveness of integrative programs and concluded that, in almost every case, the students in integrative programs performed well or better on standardized achievement tests than those students from traditional curriculum programs. Many quantitative and qualitative studies have confirmed the effectiveness of IC and overwhelmingly supported that students can benefit from IC in different areas, such as academic achievement, teamwork, ownership, motivation and attitudes (Cviko, McKenney, & Voogt, 2013;MacMath, Roberts, Wallace, & Chi, 2009;Lewis & Shaha, 2003;Zhbanova, Rule, Montgomery, & Nielsen, 2010). A closer look at the existing literature indicates that a variety of factors may affect IC implementation in schools, including teachers' beliefs in IC, teachers' knowledge and skills in carrying out IC, and many other issues beyond teaching.…”