They added 1st graders in the 2016-2017 school year, 2nd graders  in the 2017-2018 school year, and added 3rd graders in the 2018-2019 school year. They'll grow to add fourth graders soon.
Starting in the 2016-2017 school year, they began adding 1st graders. The following year, they added 2nd graders. In the 2018-2019 school year, they brought on 3rd graders. They're now preparing to add 4th graders.