A screen magnifier makes the screen bigger and increases the contrast. This helps people who have low vision or are color blind. This could benefit students in the classroom that can't see very well or who might be color blind. Students might not be able to go to the eye doctor and get glasses so this could be a temporary solution for that problem.
Speech Recognition Software
Using this software the computer can turn your speech into text and even be operated using voice commands. Disabilities that could be services are dyslexia, physical disabilities, vision impaired, learning disabilities, and strain injuries. Students that could benefit would be English Language Learners, students who are blind or have limited vision, or don't have the motor skills to be able to type on the computer.
No, I have not experienced any of the above assistive technologies. I have seen some in movies and through being around other people.