Previous research stated that science achievement is able to increase due to inquiry-based instruction, students’ attitudes toward science, teachers’ support and others. This was also confirmed by Amaral, Garrision and Klentschy (2002) who stated that an inquiry-based approach has a positive impact on students’ academic achievements. Johnson and Lawson (1998) claimed that nothing seemed to be lost when switching to inquiry- based instruction. Moreover, he added that much was gained. Tepe (1999) and Aknipar et al. (2009) found that students’ attitudes toward science lessons increased as their grade increased. Teachers’ teaching methods influence students’ behavior towards learning (Raffini, 1993).