Recommended answer:
Select at least three strengths that are related to the position you are applying for.
Also, it would be wise to choose at least three positive adjectives that would describe you both as an ESL teacher and as a person, such as honest, responsible, hard-working, punctual, peaceful, extrovert, teachable, etc.
In addition, mention your basic interests, hobbies and skills that are related to the job.
You will get more ideas here...
