ASD students in the classroom

This year I have had a challenge in my classroom with 3 ASD students. I have a para if not more then 1 in my classroom during the day. I have become frustrated with the communication between my self and the SPED teacher and parents. The parents seem to communicate with her and I then am not always informed of information that if important to know about the child. I think that the parents are missed informed or unaware that I have those students in my classroom all day with me and they have little contact each day with the SPED teacher if any. She is supposed to be coming in my classroom for support each day for 20-30 min and am luck if she is in my room a couple days a week. There is not enough support given to the classroom teacher for these students at the beginning of the year. I have never really been given support or information other then their IEP about techniques or ways to deal with these students in the regular ed class. I feel that it is the SPED teachers responsibility to check in with these students on a regular basis or daily at the end of the day to go over their day. I think that the district needs to do a better job of having a time for teachers to meet with the SPED teachers at the beginning of the year and several times during the year to discuss ideas and issues about the SPED students in their classroom. Does anyone have any suggestions on how to work with these types of children in the class and with the special ed department?