Good composition... but i must say what i think... I wouldn't have used a blurry shot as the first one. It make me think you don't understand shutter speed :-( Maybe you really want this effect maybe not, who knows?
i may not understand your language,but i like your picture. following the girl with your camera had a nice movement effect,and the large area occupied by the blackboard is compositionally effective,at least for me ;-) kostas