My wand is not working

It's the begining of september in the Howarts school of Witchcraft and Wizardry, you are one of the pupils in your second year cursing.
Yesterday you were perfoming some spells with your house friends and accidentaly one spell hits your wand and now doesn't work surprisingly.
it is crucial that you repair your wand because its your most important tool to learn new spells and pass your classes at school.