When using MLA style where do you position explanatory notes?

Years ago, MLA expected that footnotes would go at the bottom of the page. Today, while some writers still do it the traditional way, many other writers use internal documentation, sometimes called "in-text citations." That means the footnote is contained within the sentence where you have cited someone. For example: It was media theorist Neil Postman's belief that technology was rarely neutral. He said in The End of Education that "All technological change is a Faustian bargain. For every advantage a new technology offers, there is always a corresponding disadvantage" (Postman 192).

A good explanation, with examples, of MLA internal citation can be found in the related links.

As for end-notes and/or bibliography, they still go at the end of your report or essay.