When putting your documents into blackboard there are a few tricks that I have found that really help you out as an instructor. I have observed most instructors doing 1 of 2 things when putting their files into blackboard and I choose option number 3.
The first and easiest thing is to simply upload your Word or PDF documents directly into blackboard. This is easy for you. And the students can simply download the files. The disadvantage is that students need to download the files and you cannot make changes to the documents once they have the hard copies. This becomes a chore if you post this in 3 different places and then need to make changes.
The second most common thing is pasting your text into blackboard so that there is nothing to download. This does take longer as you need to reformat it once you do the copy/paste but its easier for your students. The advantage is that you can edit the documents throughout the semester as needed because there is one master copy. The disadvantage is that you cannot easily email it to students unless you also have a Word/PDF version.
As I said, I choose option 3, which is have found is more or less a combination of the two. I provide students with a link from a shared server (ie dropbox) in blackboard. That way, whenever students click the link they are taken to the document via the web browser. Plus, if I want to make changes to the documents I can simply make the change to the actual file without having to navigate in blackboard. This is especially useful if you put your syllabus is 2-3 different places (ie on the main page, then in discussion forums, email to students, etc.). This makes it very easy and you can tell students that whenever they want to see the document to please click the link. Any downloaded version is always old. I also put a modified date at the top so they can match up downloaded version to the latest link.