Mr Price will not be allowed to work as a teacher for two years.
The comments had offended parents, pupils and staff, his professional misconduct hearing was told.
Mr Price told BBC Wales he did not think he should apologise for his remarks.
The “Provoked Pedagogue” blog, which Mr Price wrote for 18 months, also claimed pupils snorted cocaine at the school prom, which he said was more important to both pupils and the school than education and exam results.
But speaking after he was struck off, Mr Price said his blog was satirical and he had never intended to offend anyone.
He added: “If you read the blog in its entirety, it makes the absolute opposite points that they claim it does.”
Mr Price can apply to be restored to the teaching register in two years, but he said he has no intention of trying to return to the teaching profession.