In the online version with professional support, the psychologist in charge will have the role of monitoring the autonomous work of the participants during the 8 sessions, as well as answering questions and doubts that the participants may have regarding the program and its implementation.

In the version without professional support, the role of the psychologist in charge will be to keep the platform updated so that the person who self-administers the intervention does not have technical problems associated with the platform.

Control group without any intervention.

The psychologist in charge will have the role of monitoring the autonomous work of the participants during the 8 sessions. The psychologist in charge will also verify that the participants are able to complete the online modules week by week, that they understand the contents taught in the module and that they are practicing the tasks and exercises assigned in each of the modules; in addition to generating an action plan in case the participants are not adhering week by week to the self-administration of the program. The follow-up and contact with the families will be carried out by phone and through a weekly email-type messaging system, implemented within the same platform on which the program material is found

A questionnaire exploring the acceptability of the program will be answered by parents/main caregivers of students attending Grade 1 to Grade 4, Primary school, who will participate in the intervention. This questionnaire asks about the parents´opinions about the content of the intervention, strategies used, materials, and performance of the health professional helping in the intervention.The latter is only applicable for parents participating in "Group Triple-p online with professional support". The questionnaire also asks about satisfaction and the helpfulness of the program to improve parenting management. For each statement, the answers can go from 1=Strongly disagree to 5=Strongly agree. A high score means higher acceptably and satisfacción with the program. This is a questionnaire created by the research team.

A register will be used to determine the number of schools initially contacted and the number of schools that accepted to participate; number of parents/main caregivers contacted and that consented and assented to participate in the study at baseline and at follow-up; the number of sessions completed by parents in the platform, the number of telephone contacts delivered by the health professionals, the number of meeting over the phone conducted with parents. This Feasibility Inventory (FI) was created by the research team. This registry will not produce a score, rather it will provide indicators to achievements for several areas of the implementation of the program.

This 30-item questionnaire measures three dysfunctional discipline styles: Laxness (permissive discipline), Over-reactivity (authoritarian discipline, anger, meanness and irritability) and Verbosity (long reprimands or reliance on talking). The scale has good test-retest reliability (r = .83, .82, and .79, respectively) and has been found to discriminate between parents of clinic and nonclinic children; and to correlate with observational measures of dysfunctional discipline. Each item is answered in a scale of 7 points, according to what are the typical behavior parent perform under each scenario. A total score is computed, ranging from 30 to 210. A high score means parents are choosing more effective strategies to deal with different scenarios.