Below are some links on how to use closed captioning on Youtube. Youtube will caption videos automatically but you need to edit these captions for accuracy, and punctuation.
Providing audio or text to speech options gives an important additional way to access content for students.
Use text-to-speech software - Google Chrome extensions - Google Read-Write
Vocaroo - A web-based digital recorder that allows them to record their voice and send you a link to access.
Use these manipulatives to support the learning of math concepts.