has been used, for example, to help students with autism learn and respond to activity schedules. For young learners, the use of animation directs their attention to important features and prompts them to help ensure correct responses. Teachers can create literacy lessons with attention-grabbing elements such as moving graphic images. For example, a teacher might focus on the initial /d/ sound in the word "dog" as an instructional goal; a presentation slide for this would show a picture of a dog, and the teacher would select three possible letters to represent the initial sound in dog, such as /b/, /c/, and /d/. After showing the picture of the dog, and then displaying each of the three letter choices one-by-one, the teacher would ask the student what letter he or she thinks "dog" starts with. Other types of presentation software for literacy instruction, such as Photo Story, can allow teachers to add a variety of special effects, soundtracks, captions, and their own voice narration to the photo stories. See also School Psychology Minimally invasive education Positive education Positive Behavior Interventions and Supports Notes General references National Center for Education Evaluation (2009). "Assisting Students Struggling with Mathematics: Response to Intervention (RtI) for Elementary and Middle Schools". Further reading Special education Educational assessment and evaluation Education policy