ESL job interview question: How much has your brain color changed over the past three years?

Recommended answer:

Analogical question would be: 

Does your brain colour change throughout your life or does it remain the same?

To answer this question you should have in mind that the recruiter actually means, 'How much of useful ESL teaching and research experience and skills have you gained over the past three years?'

Tell about your skills and experience that you gained over the past two or three years.