Assistive technologies make learning possible for students with disabilities by extending their abilities through physical and sensory access tools. Examples include interactive storybooks and reading pens to help students with cognitive difficulties, joysticks and switches for physical disabilities, and screen readers and FM systems for sensory impairments. Similar technologies benefit at-risk and gifted students by making learning engaging through games, immersive environments, and alternative forms of expression. iDevice apps also provide assistive options such as communication boards, interactive books, and switch-controlled games.