"This is about making our students more employable. They will go straight to the top of any job list.
"Out of 300 students, 100 have said 'yes I am clean and I am ready to go'."
There would be repercussions if any of the students had drugs in their system, he said.
"If they are tested non-negative, they are stood down and are not allowed to do any practical tasks until they test clean."
Automotive student Kawhia Smith, 20, passed the test earlier that day.
He said having a drug-free record would be beneficial to his job seeking efforts and go towards improving workplace safety.
"You don't want people who are on drugs, especially in the workshop - they could drop a car on you."
Automotive student Rosalie White was also pleased with the testing.
"I think it's an excellent idea."
Waiariki Institute of Technology drug testing
•Compulsory testing starts in 2016 for all automotive, collision repair, carpentry, engineering and electrical students
•Compulsory testing already exists for forestry operations students
•Tests will be conducted by the Drug Detection Agency
What do you think?
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