Is the syllabus important for your class? At first thought and glance it would seem that it's just a piece of paper that no one reads or understands. But when you prepare it correctly, it can change the outlook of the class for a student as well as help keep you organized and "on point". It simplifies the course, showing simple objectives and goals and a road map of expectations. By doing this, it gives you and your students a central location to see where they have come from and where they are going, and it allows everyone to focus on the single task at hand.
Here's more information on the importance of a course syllabus.
This are a couple of excellent resources that provide a lot of buy-in for you as an instructor. "Studies about syllabi show that they play a role in students’ perceptions of the instructor and student motivation."http://www.duq.edu/cte/teaching/teaching-tip-ten.cfm
Here's more for help on what works:
On the topic of buy-in, here's what's out there as far as the perception of a syllabus from a learner's point of view. What will your students be looking for, and how can they use it. It's like sitting in on a conversation from one successful student to an upcoming one.
And don't forget: Your students might be moving on to college courses later. The course syllabus is standard, and that means your students can have a leg up if they know what to expect and how they can use a syllabus to stay organized.