Students who have not yet been offered the inoculation, or those who have received only one dose, are being asked to fill out an online form.
After the form has been completed, staff from the vaccine contact centre will be in touch to make an appointment.
They want to make sure that students who are eligible for the vaccine receive both doses as soon as possible.
The goal of Public Health is that every islander over the age of 18 should have been offered at least one vaccine dose is by 1 July.
The target for the over 50s is for two doses.
That July date coincides with a planned change to the border restrictions.
As of Friday, 76,401 doses had been given in the Bailiwick, and 56% of population aged over 16 had received two doses.
The local vaccination programme has been regarded as a big success so far, and Public Health wants as many adults as possible to get vaccinated to stop the virus potentially mutating into new strains that are resistant to the current vaccines.
Guernsey is high up the worldwide charts in the internationally used statistic for vaccination figures.
It has given out 116.1 doses per 100 of population, putting the island ahead of Jersey, the UK, and the Isle of Man, but trailing Israel and the United Arab Emirates.
. The online form for returning students is at gov.gg/summerstudentreturn
. There are now four active cases, with two more positive tests over the weekend. Both were inbound travellers and are in self-isolation.