Everyone Knows Better Than the Teacher?

I work at a residential treatment facility with preteens and teens. The clients in my classroom have disabilities, varying from ADHD, dyslexia, intellectual disabilities, fetal alcohol syndrome, etc. It would be great if I could have the classroom read the same text aloud with full comprehension of all students or do a class spelling test. One of the behavior techs have took in on himself to overstep and have the kids read a book like in popcorn reading style, even when some of them cannot read at the level. It can be frustrating for some of the kids. He is also wanting them to learn the same spelling words and take a test on Friday.

It may be okay to play school but I think it is detrimental to what I have built. I wish it were that simple but it is not. I think it is extremely disrespectful for him to try to do these things. Why do people believe they know better than the teacher? This is not my first year, this is my eighth. I've worked with kids with various disabilities throughout the years. This is what I have completed my masters work in. I differentiate tasks for each student based on where they are. It may look like I'm not doing much but based on the behavioral needs of the kids, I am doing the best that I can.

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Sorry for the typos. I'm a little angry at the moment.