Star of the week certificate

I love this idea. I will be using this alongside a "star of the week" chart which will feature a picture of the star. Every week I will use a different criteria to choose the star. One week might be most improved in behaviour and attitude another might be top speller and yet another might be for who kept their area the tidiest. They do not know from week to week what will be awarded. This way everyone has a chance to be a star.