"i was forced to send my children with my mom so in the end cps was called and i am now being investigated with the chance of them being taken."
School teachers, principals, medical personnel etc. are all what are known as "mandatory reporters" of suspected abuse or neglect of children. If they even remotely suspect a child is at risk they are required by law to report it to the proper authorities so that the appropriate investigation can be done to assess the chidren and if they are at risk, intervention started.
Children being moved and changing schools three times or more in less than two years along with one child being special needs is indeed cause for concern.
"if any one knows what i can do to fix this mess id love to hear it."
Once a case file is started and the children are in the system even if CPS does not have custody they are obligated to develop a parenting plan of action that the parent(s) must follow in order for them to regain custody. Find out what it is and follow it to the letter.
"i wonder if being falsely accused or declamation of character"
No. As I and others said, the school officials are mandatory reporters. It is likely that the number of moves you made and the amount of school they missed or failure to progress triggered a mandatory reporting under state law. As such the reporting of the situation is not defamation of character and the person(s) doing the reporting are immune from law suit for doing so under the mandatory reporting laws.
"is grounds for attaining a lawyer."
For filing a law suit? No. For representing you and your children in Family Court: yes.
"That's just my opinion, then again I might be wrong." Dennis Miller