Now consider the interaction between student qualities and the materials and methods currently available in your curriculum unit or lesson. Remember, missed opportunities for learning are also barriers, as are factors contributing to students' lack of engagement. Check the Curriculum Barriers Mentor for a Model. Materials and Methods Student Qualities Potential Barriers/missed opportunities No information was recorded in the first step of this tool. Before entering information about student quality and potential barriers, return to the previous step and enter information about the curriculum material and methods.