Teachers can develop learning tools to deliver materials according to the characteristics of the material, because not all material can be delivered in the same way or method. In certain situations there are times when learning cannot be done directly in the classroom. So, the teacher must adjust online teaching or distance learning (DL). Efforts to support DL go well, then teachers must prepare supporting learning tools. The learning can be practical so that the learner is more interesting and fun. Problem solving laboratory (PSL) is a learning approach that uses problems as the basis for teaching and learning activities that must be solved through practical activities in the laboratory. The research method used is ADDIE (Analysis, Design, Development, Implementation, Evaluation). This research aims at learning tools that support practicum-based DL by applying the PSL learning models so that students can find material concepts independently. Validation results by material experts were 89%, learning experts were 87%, and media experts were 82%. So based on the results of expert validation and testing on students, the learning tools developed were feasible to use.