Math Playground has lots of informative videos on a variety of math topics, from Numbers and Arithmetic to Algebra and Geometry, and everything in between.
Parents, please be aware these links will take you away from My Audio School, to a website which allows pop-ups.
Videos show a whiteboard with a teacher’s voice, explaining how a problem is worked. In addition to numbers, some videos show graphics, such as bars divided into fractions, etc.
There are also neat manipulatives, make-your-own and pre-made worksheets, and flashcards, though none of these appear to have an audio component.