“…While there are studies claimed that computer assisted teaching increases students' achievement (e.g. Acar, 2015;Baki & Özpınar, 2007;Güven & Yılmaz, 2012;İçel, 2011;Kepçeoğlu, 2010;Öz, 2015;Selçik and Bilgici, 2011;Sümen, 2013;Türk Samur and Akyüz, 2015;Uysal, 2013;Uzun, 2014), there are also other studies claimed that there are no effects of computer assisted teaching on students' achievement (Demirbilek & Özkale, 2014;Forsythe, 2007) in the literature. In the present study, it was concluded that both the DG software and physical manipulatives significantly increased students' achievement at the same level.…”