Are you a parent looking for more information on the R sound? 

Are you an SLP that would like a concise reference handout for parents and teachers on the production of /r/, especially vocalic /r/? 

Here’s a link to a short article that I guest wrote for MommySpeechTherapy.com
that contains some of the basics that you might be interested in. 

Click on the link to view: Correcting the R Sound: A Primer for Parents