Teachers in Hong Kong are susceptible to professional stress and its associated psychosomatic illnesses. To enhance teachers' well-being, mindfulness training is conducted in local schools. The present study is a randomized controlled trial to explore 1) the relationship between mindfulness, common humanity, self-compassion, compassion, and well-being of school teachers; 2) whether mindfulness and common humanity are the antecedents of self-compassion and compassion; 3) the conditions under which compassion and self-compassion are highly correlated. Participants will be randomized to either intervention (8-week .b Foundations course) or waiting-list control condition. They will complete an online survey before (baseline), after (post-intervention), and two-months (follow-up) after the intervention.

Inclusion Criteria:

• Aged 18 years old or above
• Working in local schools or education institutions
• Willing to participate in mindfulness training voluntarily

Exclusion Criteria:

• Experiencing severe or unstable mental health condition currently
• Completed 8-week mindfulness training previously
• Unwilling to go by random assignment