Two "Articulation Mouth" pages to teach the difference in mouth position between V and B sounds.
I've found this sound combination to be less frequent in English speaking students, but have stumbled upon a few students who did in fact need some articulation therapy for these sounds.
Spanish speakers often use the V and B sound interchangeably.
Typically we do not offer speech articulation therapy for accents, because accents are a language difference, not a problem. Although you may have a client who is seeking accent reduction for personal or professional reasons, like acting.
I like to begin speech articulation therapy with these coloring pages, so student can color while listening to my lesson on tongue placement, mouth position and air flow, and while they practice correct placement, and repeating the sound in isolation.
Once we move on to syllable or word position, I like to keep their coloring page displayed so I can point to the part of the mouth they need to focus on and correct.
They can also take the sheets home to hang up as a reminder to practice, thus facilitating generalization of the sound.
I also display the whole mouth collection above the white board, so students can easily visualize that our mouths look different for all sounds, while they wait for their turn in group.
Also, I always have folders of these "Mouths" on hand for any new student or new sound a student might need, or for comparison between sounds.