Tomlinson (2009) described differentiated assessment as an ongoing process through which teachers gather data before during and after instruction from multiple sources to identify learners needs and strengths. In a quality class that is built on the foundation of differentiation the teacher will infuse a constant stream of assessments (before during and after) to help identify students needs and to help improve learning. Use the information in your text and from the following websites and video to explore definitions explanations and examples of pre-assessments formative assessments and summative assessments.Instructions After viewing the resources: