I would be glad if you correct my letter (I am a director and a non US citizen)
To Whom It May Concern:
As the Director of High school and a Director of a Non-profit Organization, I have the opportunity to contact with both community volunteers and Students. I consider xxx to be one of the most studious, hard-working and responsible members of our organization as well as one of the best in High School. After two years, I have come to know him with two perspectives and would like to recommend him as a candidate for your undergraduate Studies.
xxx brings value everywhere:
xxx a dedicated member of the Organization. He donates countless hours and energy to the Organization. He has not only worked with members of the Organization but also helped to implement plans and programs that will enrich the lives of those around him and broadens people's involvement in community services. xxx's leadership and technical skills have been invaluable to Organization's programs, most of which have been started from the ground up.
[...]
To Whom It May Concern:
As the Director of High school and a Director of a Non-profit Organization, I have the opportunity to contact with both community volunteers and Students. I consider xxx to be one of the most studious, hard-working and responsible members of our organization as well as one of the best in High School. After two years, I have come to know him with two perspectives and would like to recommend him as a candidate for your undergraduate Studies.
xxx brings value everywhere:
xxx a dedicated member of the Organization. He donates countless hours and energy to the Organization. He has not only worked with members of the Organization but also helped to implement plans and programs that will enrich the lives of those around him and broadens people's involvement in community services. xxx's leadership and technical skills have been invaluable to Organization's programs, most of which have been started from the ground up.
[...]