We can decline as parents but teacher can be right neither be wrong too. No harm to have it assess. I have a co friend of mine, the son was diagnosed with mild autism after assess. She was at first shock in regards to feedback from teacher, thereafter she was approached by principal of the school, get referred and did had assess. She felt glad that she agreed because she wasn't aware of the signs for mild autism. Her son now goes to PCF and EIPIC.