Tunmore (cited in Regel & Roberts, 2002, 73) outlined various mental health promoting factors (based on evidence) that are relevant to adolescent kids and to parents alike to reflect upon. They include:

Individual

  1. Self-esteem, sociability and autonomy
  2. Social support systems that encourage personal effort and coping
  3. Good communication skills
  4. A sense of humour
  5. Religious faith
  6. The capacity to reflect

Family (Group)

  1. Family compassion, warmth and absence of parental discord
  2. At least one good parent-child relationship
  3. Affection
  4. Appropriate and consistent discipline
  5. Family support for education

Environment

  1. A wider support network within the community
  2. Good housing
  3. A high standard of living
  4. A range of positive sport and leisure activities
  5. A high morale school offering a safe and disciplined environment with strong academic and non-academic opportunities

Whilst there are some important factors here, you need to have a bit of caution in places, because for example a high morale school is clearly a value-laden assumption. It is not unreasonable to argue that for some well off children, they are at greater advantage economically and socially, than their poorer counterparts, in gaining a quality education. However if this could be achieved then yes a high morale school as described could be beneficial for social and emotion health.