As a teacher, you can enhance Tim's self-esteem by:
Providing positive feedback and praise for his strengths and achievements
Encouraging him to set achievable goals and acknowledging his progress towards those goals
Creating a safe and supportive classroom environment where he feels respected and valued
Offering him opportunities to explore his interests and strengths, such as incorporating nature into classroom activities
Providing him with specific and constructive feedback on how to improve in areas where he struggles, instead of simply criticizing him for his shortcomings.
It's also important to understand and address any underlying issues that may be contributing to Tim's low self-esteem and lack of motivation, such as learning difficulties, anxiety, or other mental health concerns.