This Research & Development (R & D) aims to develop and produce a qualified Group Science Learning (GSL) model. The main product is the GSL model that has the following syntax: (1) Motivation and problem orientation based on Internet of things, (2) Collaborative problem-solving activities, (3) Presenting, (4) Nonroutine problem-solving, and (5) Evaluation. The GSL model quality data was obtained through the Focus Group Discussion by using the GSL model quality assessment instrument. The GSL model quality analysis used average validity score, single measures ICC, and Cronbach's coefficient alpha. The results show that the developed GSL model is qualified. The research implies that the qualified GSL model by the expert judgment can improve the skills of collaborative problem-solving, science process and self-confidence of primary school teacher candidates.