Field, and a jogging track and improved lighting were added. In 2019, Lab renovated a number of its athletic facilities including its natatorium and locker rooms. Student body and academics The school has over 2,160 students in total from Pre-Kindergarten – Grade 12. Today the school is divided into a Nursery School (Pre-K and Kindergarten), Primary School (grades 1 and 2), Lower School (grades 3 through 5), Middle School (grades 6 through 8), and High School (grades 9 through 12). Many children begin in nursery school and continue through their high school graduation, and 75% of applications are for nursery school or 9th grade. The student/teacher ratio is 8:1. According to the 2021 Lab Student Wellness Survey, 48% of girls and 25% of boys, for a total of 37% of students, identify as part of the LGBTQ community. The high school was ranked fourth in the nation for its record of sending graduates to elite universities and colleges. From 2012–2016, some of the colleges at which U-High students matriculated were: University of Chicago (71 students), New York University (20 students), Northwestern University (19 students), Yale University (15 students), Stanford University (11 students), Massachusetts Institute of Technology (9 students), Brown University (9 students), Johns Hopkins University (9 students), Princeton University (7 students), Columbia University (7 students), and Harvard University (3 students). For the class of 2018, forty-nine percent of Lab students attended top-25 institutions across the country. U-High offers more than 150 different classes. All are college preparatory in nature and there are more than 30 Advanced Placement or Advanced Topic courses. High school students may also qualify to take classes at the University of Chicago at no extra charge, and about 20 do so each year. The average composite ACT score is 31.5. The school maintains four separate libraries which collectively hold over 110,000 volumes. Extracurricular activities High school students may choose from 40+ different clubs and activities. The high school math, science, and Model UN teams are regular contenders for – and winners of – state titles. The school's newspaper/website, The U-High Midway, and the yearbook, U-Highlights, regularly win state and national awards, as does its arts magazine, Renaissance. Other popular activities include theater, identity and affinity clubs, Student Council, policy debate, and Model UN. The Model UN team is consistently ranked among the top in the nation, and is world-renowned for its competitive excellence. In 2011, it was