Hi Thais,
Unfortunately, it doesn't appear that QC Design School is accredited, so if you ever wanted to transfer to a different school, your academic work probably won't be recognized.
ICS Cananda says that it is accredited by the Canadian Education and Training Accreditation Commission (CETAC). I'm not familiar with accreditation agencies outside of the United States, so I can't provide much insight about how their programs are evaluated...