1934. Do your students understand you?
I would tell you to speak clearly to your students in English, the target language.
Also give them clear instructions.
An English language teacher told me we teachers should pronounce clearly, all the words.
Nevertheless sometime you could think you have to speak more quickly, as people they encounter will pronounce.
Vocalizing is so important anyway, more at the beginning of the course, in my opinion. / Photo from: www english iup edu. Teacher smiling