what product is best to use to repair peeling paint and skim coat from ceiling

[dec]

What is the best product to use in order to repair a ceiling. There were several cracks and as soon as I went to repair them I found there was a large portion that was loose. The remainder of the ceiling is bonded well and I was wondering what to use to patch the areas that lost their bond. 
Render, Gyprock skim coat? Thanks