"F" and "V" are labiodental sounds meaning they are produced with your lips and teeth.  The top teeth rest on your bottom lip while you blow out a little air.  The "V" sound is produced with your voice on and the "F" sound is produced with your voice off.

Voiceless vs Voiced Sounds.pdf

F   V

F ColorCodingLetters-1.pdf
Search and Find Later Sounds Freebie F.pdf
I can find V word count
V Coloring Page 1.pdf
F Coloring Page 1.pdf
I can find F word count.pdf
V pictures
V ColorCodingLetters-1.pdf

High Frequency "F" Books

F is for Flag-  Wendy Cheyette Lewison

Faint Frogs Feeling Feverish-  Lillian Obligato

Fat Frogs on a Skinny Log-  Sara Riches

Flashing Fire Engines-  Tony Mitton

Follow Those Footprints-  Christine Ricci

Four Fur Feet-  Margaret Wise Brown

The Great Fuzz Frenzy-  Susan Stevens Crummel