The causalitic learning model is a learning model and is designed based on a causalitic thinking approach (causality and analytics). Based on the research results, the causal learning model can be used as an alternative learning model that facilitates the ability to think critically, creatively, solve problems, and increase student learning motivation. The purpose of writing is to develop learning tools (student worksheets) to improve the critical and creative thinking skills of junior high school students in learning the causalitic model. The research method used is 4D which consists of 4 stages, namely define, design, develop, and design. The results of this research is a special design of student-worksheets for physics learning with a causalitic-model for the material of heat and temperature for the student of junior high schools. Conclusion The resulting worksheets have unique characteristics such as loading phenomena with several elements of cause and effect, recommending the content of phenomena related to daily life, having a causality table, having space for explanations, using scaffolding, using language that is short, clear, easy to understand. understand, and use companion images of the phenomenon.