[5] Chungdahm Learning focuses on teaching English as a second language through test prep, critical thinking, and literature content modules.

[5] It launched April Institute to target younger elementary school students in 2007 and was listed on the KOSDAQ market in 2008.

[10] In April 2014, Chungdahm announced plans to partner with Knewton to incorporate adaptive learning into its curriculum.

[14][15] Chungdahm Learning was found to have run a scheme treating foreign teachers as independent contractors instead of employees in contravention of the Labor Standards Act, thereby saving costs by not paying severance contributions to pension or health insurance.

[14] Also in 2015, an employee of an April branch of Chungdahm Learning denied a job application from a person of color on the basis of race, asserting that their customers preferred Caucasian teachers.