PROVIDENCE, R.I. (AP) — A Rhode Island school district criticized by Gov. Gina Raimondo for not bringing all of its students back to the classroom will resume in-person learning for all children later this month.

Warwick’s kindergarten and elementary school students began returning in October and November, but classes for older students remained exclusively remote. Now, middle and high school students are scheduled to resume in-person lessons on a hybrid model on Jan. 21.

Superintendent Philip Thornton told The Providence Journal that several factors make an in-person return possible: including the installation of 1,400 air purifiers, with at least two in every classroom; and additional protective and safety equipment, including plexiglass shields where needed.

“At this point, we’ve done what we needed to get ready,” Thornton said. “In our last parents’ survey, a large majority expressed the desire to go back.”