@c_desilva In Kenya we have found that most teachers with their own laptop or access to a laptop are eager to use the GCF LearnFree’s modular lessons that cover e-mail, Internet browsers, Apple, Windows, Windows Office applications, and many other needs for adults. (All of the content of RACHEL is accessed via a browser.)
Email this link to your contacts in Tanzania as soon as possible. If they can access their email from a computer, they can try some lessons out before you arrive. First take a look yourself to see if these lessons look appropriate to you:
GCF Learn Free http://rachelfriends.org/previews/rachelplus-full/modules/en-GCF2015/index.html
Working with adults is actually much easier than using RACHEL in a formal class with fixed time periods and a fixed curriculum. Once you tell adults they cannot spoil the videos on RACHEL or the computer they are using, they should relax and get going, not as fast as the kids, but faster than you would expect.
With several adults working in the same room, they can help each other. If you can afford and instructor, keep the lecture time to a minimum, setting out the assignment and doing a quick demo. Then the lecturer should walk around the room while the learners struggle. An instructor is not necessary. The computer lab monitor, possibly a student who likes computers, can get people started.
I would then focus my time during the trip with the people who have already accessed the link and can tell you what they have found most helpful. If you do not identify interested people and create some demand before your trip, you will find you are just beginning to see benefit when the trip is over. After many trips, I would focus on helping a few people really benefit rather than interesting a lot of people.
Focus on what people will put to use immediately, probably e-mail and Word and then Excel and Power Point for teachers and others who need to make presentations. I have used spreadsheets since Visicalc was released in 1980. I have never set up a database in Access or any other database program, although I find these covered in most introductory courses. For adults and university students, avoid broad coverage, focus on what they will use immediately, otherwise they will forget.