The first step to designing or redesigning a course is writing student learning outcomes. What do you want your students to know or do when they are done with your course? What are the absolutely essential concepts they need to understand and apply? What should they remember after 5 years? 10 years?
Variety is the spice of life. A variety of assessments can help you understand what students are learning and doing in your course. How do your assessments measure student progress towards your learning outcomes? To what degree? Do you have a balance of formative and summative assessments?
Rubrics allow you to grade student performance with consistency, transparency, and fairness. Rubrics can be holistic, measuring a group of criteria at once, or analytic, measuring a set of criteria individually against a performance scale. What are the most important criteria for evaluating your students?