Hi Bratzki,
I am a high school teacher in Hemet and Whole Brain Teaching does work with high school kids. I do not use all elements, but the "Class-Yes", "Teach-Okay," and gestures are amazing! I really like WBT because I think it forces the students (and the teacher) to be active participants during class. My best advice for incorporating WBT into high school classes is to tell the students why you are going to use WBT teaching. In my room I have a poster that says:
We learn
10% What we READ
20% What we HEAR
30% What we SEE
50% What we SEE and HEAR
70% What we DISCUSSED with OTHERS
80% What we EXPERIENCED PERSONALLY
95% What we TEACH TO SOMEONE ELSE
I told my students that WBT uses more of their senses than just hearing and that will help them to learn better. I also tell them that it might seem kind of silly, but that's okay because math is fun! I think that admitting to your students that what you are about to do might seem strange and different helps them to understand (1) that they are going to do it because it will help them learn and (2) that they don't need to complain about it being silly because you already know that it is supposed to seem silly at first. Well, I hope this is helpful.