[1][2] She grew up training for basketball under the guidance of her father, who played for UTEP at the collegiate level, and drew inspiration from Maya Moore.

[3] In her first high school season, she was the only freshman on the team and averaged 16.7 points and 6.8 rebounds per game, leading Rock Island to a 29–4 record.

[5] As a sophomore, Beal averaged 20.6 points, 9.8 rebounds, 3.2 steals and 3.1 assists per game, helping her team achieve a 31–2 record and reach the sectional final.

[8] In her junior season, Beal averaged 21.9 points, 10 rebounds, 3.3 assists and three blocks per game, leading Rock Island to its third consecutive Class 4A sectional runner-up finish.

[9][10] As a senior, Beal averaged 24.9 points, 13.7 rebounds, 4.5 assists, 3.4 blocks and 3.4 steals per game, as her team finished with a 30–2 record and won its first sectional title since 1991.

[5] On November 8, 2018, during her senior year of high school, Beal committed to playing college basketball for South Carolina over offers from Michigan, Illinois and Louisville.

[20] In her junior season, she helped South Carolina win the national championship,[21] recording 12 points against Louisville in the Final Four.