Praise the grind, not just the grade. People repeat what gets noticed.

Praise tells people what to repeat. Aim it only at results and you teach them to protect their record, avoid risk, and feel like a fraud when a result goes badly. Aim it at the work, the hours, the attempt that did not come off, and you reinforce the part they can actually control. Same person, different instruction.

When someone near you does well, mention the specific thing they did rather than the outcome. It works on yourself too, so say it about your own week.