Abstract The basic consideration of this research is to make a valid evaluation tool and as a renewal in the evaluation of the learning that has been done. This is because evaluation tool is a very important thing to measure competency achievement. Efforts to improve the quality of learning can be done through learning tools and how the assessment is applied. This is actually one of the factors that determine student achievement. Another factor in learning Geography is the factor of within each student in this case critical thinking. The purpose of this study was to produce a valid learning assessment tool in disaster geography. This research is a two phase research development that is preliminery research and prototyping research. The results of this study can be three types of assessment: self assessment, peer assessment and critical thinking assessment.