Okay, first, I would like to note that we are only hearing one side of the whole thing? From you posted, you didn't really give any definitive example of exactly what you stated, and what the parents reaction was.
It is entirely possible that it is a very bad case of miscommunication! Sometimes when faced with information that causes concern, people react in different ways.
You mentioned that you tried to express your concerns. But, did you lay out a positive plan of action. If not. Then that is the whole problem. When people have a problem, they don't want a laundry list of concerns. They want to know what the next step is!!!! This is imperative. If you did not do this, then just what did you expect the parent to do??? Sit there and join you in going on about how badly their child is doing?
As a parent, I have to say that I had just the exact OPPOSIT happen with my DS teacher last year. He was having major difficulties. ( I finally, personally, took DS and had him evaluated and he was diagnosed with a serious learning disability) The teacher spent the entire year ignoring my desperate pleas for help!!! Her whole plan of action was to sit back and watch my DS FAIL! "He is just not 'ready'" she said. "He will do better next year when he is held back to repeat" HUH!!!!! So a teacher spends an entire school year watching a perfectly wonderful and intelligent and mature child FAIL!!! (Yep, another one of the well known 'High and Mighty's.)
Anyhow, that teacher most probably thought that I was thinking that my child was a possible 'class valedictorian' because I was trying to say that my son is a smart, well-behaved, child... There has to be a problem here. Well, obviously, Ms. High and Mighty was NOT hearing that I felt that her approach was contributing to the problem. So, I am sure that to her, I was just another one of 'Those Parents' who thought that my child was just wonderful, when to her, he was just not able to even pass muster.
It is hard to tell from your short post. But, I am thinking that it is time to write up your concerns in very very simple language. Also requesting another conference, with the principal or counselor, or 'somebody' present. Make sure that it request that the memo be signed and returned. And that there is some way for the parent to select a convenient time for another conference.
Here would be a simple example.
Dr. Ms. ____________
Thank you so much for coming in for our parent-teacher conference
I felt that we did not have adequate time to cover these details. so I am sending this to you to keep you well informed of your childs progress.
In our ___ grade curriculum, we have many goals and objectives. I feel that your child may be struggling with the following skills/concepts.
In math, the students are mastering __________. Your child demonstrates difficulty with ___________.
In reading, the students are mastering ________. Your child demonstrates difficulty with _________________.
I think that it will be very helpful if we consider ____________ plan of action. This may help your child succeed to their potential. : )
I would like to schedule a conference with you, and include Mr.___________ the school counsler/principal/resource teacher/ etc. I have suggested some times below that I hope you might find convenient. If these will not work for you, then feel free to contact me and we can make arrangements.
Please sign and date below, and return this to me as soon as possible.
I look forward to seeing you again.
Sincerely,
Ms. ____________________________
Parent signature ____________ Date _____________