Power point presentations

In health class, we are studying drugs. So, I thought the best way to do this was to have the students pick a particular drug and complete a 3 page paper on it. After they complete the paper, they are then going to create a power point presentation on it. The students are in 11th grade and have never completed a power point. I know that they have computer class and speech class, so my question is why they have never done something like this. I know that 4th graders have completed a report with power point before, so why haven't the high school kids? Just wondering if high school computer classes at your schools have this built into the curriculum, or if teachers just add it theirs when they need to?