Curriculum is a 'set' of courses. So to get a pharmacy degree you need to take a specific set of classes
Syllabus is an outline or overview of wht will happen in a specific class, itusually includes a schedule ( what will be covered each day) a reading list ( and specific readings for each class) an attendence policy, grading policy etc.
A lesson plan is a detailed description of a single class within a course, so on Tuesday we will learn a new method for calculating area under the curve and then we will work on problem set 4 in small groups then the entire class will come together to review the answers for the problem set.