There is no exact reply to this question. Maybe the best answer is less than a phonetician and but more than your students! A corollary of this formula is "do not tell your students all that you know about pronunciation'. By doing so you would only burden (or bemuse) them. The same can be said about grammar. Now, let's check how knowledgeable you are about it!
1)How many letters are there in the English alphabet?
2)How many sounds are there in British English?
3)How many sounds are there in American english?
4)Is sound /s/ voiced or voiceless?
5)What is the name of the most common vowel sound in English?
6)What sound might this teacher be describing: point the front of your tongue towards the roof of your mouth. Use your Voice. A)/f/ B)/r/ C)/n/
7)What sound might this teacher be describing: hold a small piece of paper in front you lips. The paper will move for one of the sounds, but not the other. A)/s//z/. B)/k/ /g/. C)/p/ /b/
8)Which of the words contains a diphthong? A)cat b)make C)week
4) voiceless/ unvoiced
7) /p/ /b/