CLINICAL TRIAL / NCT06446661

Inclusion Criteria: * Age of 15-39 years-old at the time of initial ALL diagnosis * Diagnosed with ALL * Currently receiving treatment with pediatric-based regimen that includes maintenance with mercaptopurine and methotrexate (e.g., CALGB 10403). Study participation begins with the start of maintenance, so enrollment occurs prior to the start of maintenance. Exclusion Criteria: * Patient or caregiver who would receive text message reminders does not have a cell phone that receives text messages * Patient does not wish to participate * Text messages will be crafted in the patient's preferred language for medical communication, so English fluency is not an enrollment requirement.