What kind of files
can I upload to Blackboard?
Uploading just means putting
your document "up" onto the Blackboard server or any Internet
server. You can upload just about any file type to Blackboard,
however the type of document that you upload affects how your
students can view it. If you upload documents that were created and
saved in specific software programs (Word, PowerPoint, Excel, etc.),
your students will have to have that particular software to view the
documents.
For example, if you
upload a PowerPoint document (as a .ppt or .pps), your
students will have to download the file and then open it in
PowerPoint or the PowerPoint viewer. This is also the same for media
files. If you upload a Excel spreadsheet, your students must have
Excel to view the file.
However, if you save
your files as HTML and then upload them to Blackboard, the students
can view the documents directly on screen from within Blackboard.
This is preferable for course information and materials, but there
may also be times where you would want to upload files for download.
These include when giving students a template or form that they will
need to print out or modify. In those cases, leaving the document in
its original form would be preferable.
Note: Because
Blackboard is cross platform (works on Macs and PC's) and also cross
browser (Netscape and Internet Explorer) any file you wish to
upload, whether it is for download or on screen viewing, must have a
three or four letter file extension (such as ".doc" or ".html")
which designates its type. The PC will automatically add the
extension for you, but the Mac will not, so Mac users must manually
add the extension to all documents.
How should I save
my graphics?
The most universally supported file formats on the Web are GIF
(Graphics Interchange Format) and JPEG (Joint Photographic Experts
Group) format. The basic guideline is to use .gif format for
graphics that have few colors, graphics that contain text or type,
or graphics that have large areas of a single color. Use .jpg format
for graphics that have many colors and lots of fine detail, such as
photos.
It is important to
remember that Blackboard will upload all graphics in their original
size. Make sure that you have sized and saved your graphics in an
appropriate size for your course site. There are recommended sizes
shown in the Page Editors when uploading course banners and staff
photos.
How fast (or slow)
will my files be downloaded?
When developing your course materials, remember that most
students connect to the Internet via a modem. Files should be kept
small enough so users with slower connections will still be able to
access the files in a reasonable time. If this is not possible, try
to minimize file size by using a file compression tool such as
WinZip. These are often available free online.
If you cannot keep
the file size down, an alternative is to provide the student with
information describing what the file is and why it is important.
Often, simply letting a student know that the download may take
longer than usual will diffuse any frustration associated with the
long process.
Use this chart as a reference when
determining the download times for files:
| |
K/sec |
100K File |
1MB File |
5MB File |
10MB File |
| 14.4
Modem (older modem) |
1.5 |
66 sec |
11 min |
57 min |
114 min |
| 28.8
Modem |
3 |
33 sec |
6 min |
28 min |
57 min |
| ISDN |
7 |
14 sec |
2 min |
12 min |
24 min |
| T1
(fast on-campus or business
connection) |
150 |
1 sec |
7 sec |
34 sec |
68 sec |
Keep in mind that times will vary
based on Internet traffic and connection speed.