“…(Badrun & Hartono, 2013;Farhan & Retnawati, 2014) A number of studies have been conducted to measure the effect of Project Based Learning Model and Guided Discovery Learning Model towards motivation and learning outcomes, attitudes and learning outcomes, mathematical communication skills, problem solving skills, process skills, critical thinking skills, creative thinking of mathematics. (Ambarwati, Dwijanto, & Hendikawati, 2015, Maghfiroh, Susilo, & Gofur, 2016Mahanal, Darmawan, Corebima, & Zubaidah, 2009Muslim, 2017;Noviyana, 2017;Pratama & Prastyaningrum, 2016;Ramadhani, 2017;Salu, 2013, Susanawati, Diantoro, & Yuliati, 2013Susanti, Musdi, & Syarifuddin, 2017;Tafakur & Suyanto, 2015;Widayati, Suyono & Rahayu, 2018) Based on the research that has been done before, the update in this research lies in the use of PBL and GDL model to measure the ability of mathematical representation and review it from learning motivation. The purpose of this study is to compare the model of PBL and GDL to the mathematical representation ability observed from learning motivation.…”