I have a HLTA in a class that said 'you would be stupid to do that!' regarding my handling of a behaviour issue with a child, she shouted this out and stormed out of my class. Then the children started asking me why she called me stupid? Also i have heard this individual has been spreading gossip about my competency (even though i have had a very successful year!! My performance management proves it!!). I can honestly say i have been fair and just to this person. I can not quite understand why this person has done this. This person has been a great help to me on many occassions, we have had a laugh. Just shocked to be honest. Don't know how to tackle it? But can't have people undermining me in this way? I want to approach this person but i am just so hurt and emotional i don't to say things that will make matters worse. Any help appreciated.