The computer can store a vast amount of visuals for use during a presentation or lecture. Any visual can be instantly accessed with the click of a mouse button. The display can be changed just before or during a presentation or lecture. This becomes an interactive medium when viewers' decisions or ideas are fed into the computer program and the outcome is displayed on the screen. Many conventional overhead projectors do not have sufficient brightness to project the image of the LCD panel and consequently the room must be darkened.
Students have difficulty taking notes.
Not all locations have LCD panels. If you develop your presentation on a computer, you need an LCD to display it. LCD panels are fairly expensive. Conducting a brainstorming session in which student feedback is entered into the computer and displayed or graphed. Displaying animation sequences.