You can turn an essay into a clear and visually appealing multimedia presentation, for example, by putting together a presentation in Google Slides. You can maniupulate text to make appealing head line titles. You can also use images to your advantage by choosing ones that picture what you want your audience to picture. It's better to not have too much text and use bullet points, so everything doesn't look too crammed together. This also leaves room for you to say things you randomly want to add in. You can also use animations on your slides to make your presentation have a better flow to it. All of these features combined will make a great visually appealing presentation.
Because the second sentence says the students WERE passed the exam last week and <em>were</em> doesn't need to be in there. Therefore it is not correct.
