Scientists and other professionals across the globe require employees to collaborate, think critically, and solve problems effectively. To this end, the "Next Generation Science Standards" (NGSS) have a vision of ensuring that through inquiry, collaboration, and evidence-based instruction, students will have the necessary skills to be practical and rational thinkers upon graduation (NGSS Lead States 2013). Collaborative work among students is part of the vision of NGSS. Collaborative learning is a form of instruction that promotes an active classroom learning environment where the students form pairs or groups to accomplish tasks. The advantages of this method of instruction include increased conceptual understanding, retention, and problem solving and critical thinking skills. In this article, the authors describe how two teachers have used and continue to use collaborative assessments in their classes. They describe the impact on student learning and testing, and provide some tips and resources to implement collaborative assessments in any science classroom.