Please stop the arguing, bribing, threatening, etc. It is not working and does not work. Shift your focus to why she is acting this way rather than trying to make her change.

You note several possible reasons why your daughter might not have successful social interaction skills. Her ADD, OCD, and lack of confidence might be the issues. Start with the school counselor.

I cannot be specific about the cause. I can share your concern. You need to discuss these problems with the school professionals to explore what his problem areas are.

May I thank you for being so sensitive to the needs of your students. My first proposal might not fit your administrative style.

LD OnLine is a good source of information on this topic. Here is a selection of articles from the Behavior/Social Skills section of LD Topics.

Your brother is very lucky to have a brother like you. Your awareness and sensitivity go beyond your 15 years of life. It sounds like both you and your parents need help.

Often kids with Asperger’s or other autism spectrum disorders are extremely motivated by technology tools, and tend to learn very well from videos, software, and other visual representations

Who identified that he has a language processing problem? I hope it was by a speech-language therapist or a special education team.

Ask to meet with the principal of the school. Explain your concerns and the comments from his teacher.

I share your concerns. One option is to speak to the counselor who works at the middle school she will be attending. Ask for guidance and for help when she arrives.