classes:  lecturer. Speaking presentations, but actually you just read the slides, and the results, who in any group only understand the content of their group presentation.  curriculum. Speaking presentations, but actually you just read the slides, and the results, who in any group only understand the content of their group presentation.  facility. Speaking presentations, but actually you just read the slides, and the results, who in any group only understand the content of their group presentation.  general. Speaking presentations, but actually you just read the slides, and the results, who in any group only understand the content of their group presentation.