to improve

[thomas615]

Teacher, is this sentence OK?

I am not good at writing letters and this is one area I need to improve in. To do that, I plan to read more.

 

[billmcd]

Teacher, is this sentence OK?

I am not good at writing letters and this is one area I need to improve [STRIKE] in [/STRIKE]. To do that, I plan to read more.
Or the less typical/more formal, "....one area in which I need to improve"

b.

 

[emsr2d2]

I'm not sure how reading more generally will help you to write letters. It would probably help if you read lots of example letters.