While the college strike continues with no end in sight, the union is advising members not to communicate with students during the job action.
About 12,000 faculty members have walked off the job at the province's two dozen colleges, affecting half a million students.
The instructors are being advised to avoid responding to any questions their students might have about the curriculum.
"When the students come out to the picket lines, absolutely we communicate with them," says JP Hornick, head of the union's bargaining team. "But we can't use the college email system, or online classes, that would be crossing the picket line."
The union recommends an auto-reply in their email that says teachers are not responding to emails, phone calls or messages from students.
"Working with your students at this point is the same as teaching your students, and if we were to do that then it would actually increase the amount of time that the strike would go on," Hornick says.
She says withdrawing from all services is the only way they can put pressure on college management to bargain in good faith.