New York City schools will be offering second doses of the COVID-19 vaccine to kids ages 5 to 11 starting November 30th.

Students in that age group who have not been vaccinated at all yet can also get their first shots during that time.

Additionally, Mayor Bill de Blasio said the city will also offer more appointments this Wednesday and Thursday at schools that saw high demand when the vaccination effort kicked off last week. Vaccinations will be available at charter schools next week.

“We’re seeing a great response,” de Blasio said. He said 26,300 shots have been given at schools over the past week.

Around 72,000 children total have been vaccinated at city sites since the shots became available to them, out of about 660,000—about 10% of that population.

In order to be vaccinated at school, students must be accompanied by an adult and have consent from a guardian.