Many Canterbury schools were ill prepared and confused when ordered to go into lockdown when the Christchurch mosque attacks began.
A report has found many of the 221 schools and early learning centres thought the demand from police was a hoax. A quarter of them lacked food and water for children, and in many cases children weren't able to get to the toilets.
Some classrooms didn't have doors that could be locked. Our education correspondent John Gerritsen has been reading the report and spoke to Corin Dann about its findings.