In developing the instructional materials, culturally specific guidelines are carefully followed so that the training does not lose any of its effectiveness. For example, inappropriate pictures or scenarios that might prove to be offensive to the audience must be screened out. Handouts and other instructional materials that are designed to enhance the learning process are provided for all participants. If the trainees are learning a second language, generous use of visuals and live demonstrations will be employed. Despite all these efforts, however, errors sometimes occur.