Hi guys,
i would like to make a poster with this font for my school,
Would you know which one is it?

Thank you

Probably not a font, but here are some alternatives !
http://www.dafont.com/sketch-block.font?text=School&psize=l
http://www.dafont.com/sketchy-3.font?text=School&psize=l
http://www.dafont.com/h-b-sketch.font?text=School&psize=l
http://www.dafont.com/sketch-nice.font?text=School&psize=l
http://www.dafont.com/a-bit-sketchy.font?text=School&psize=l