Jamie's mother Ginny Bellamy said yesterday that she wanted people to remember Jamie's "sparkly brown eyes".
"I want him to know that his family love him and we already miss him. Other families should hold their children tight."
Trident High School will close on Thursday while it hosts the funeral for Jamie, who was a year 11 student.
Support was being offered for students, with a counselling room available for students to make use of for the rest of the week.
"At this time we ask that you are sensitive to each other. Sometimes this news can bring up feelings and emotions for you that may not be directly related to this loss but to something else that has happened in your life."
The school is also requesting that students refrain from making any comments on social media, out of respect for the family and the school.
"We will continue to support the family and each other with courage," the letter concluded.