Help your students develop their phonemic awareness and speaking skills using the free, downloadable minimal pair worksheets on this site.  The My English Image‘s site offers far more than mere images for ESOL teachers, as is evident from the page below and attached.  Please open this page’s source link to see other pronunciation worksheets.  

Download P-F Worksheet (PDF) :p-vs-f

Original Page Source Link:  http://myenglishimages.com/pronunciation/