HELP grammar question* revision*

OK here is my cover letter that i’m going to hand in tomorrow.. through the grapevine I have heard of possible jobs at a high school in the area.. anyway.. please tell me in the second paragraph should it be diverse experience, or diverse experiences.????????????????????/ i’m too exhausted to decide..

I am writing to apply for the position of science teacher within the _____________District. I have completed my Master of Science in Secondary Teacher Education and have received NYS Initial certification in both biology and general science for grades 5 through 12. A review of my credentials will showcase my passion for science and my commitment to share this passion with students.
 
 
I feel my diverse experiences, including work with alternative education students and co-teaching with a special education teacher, makes me the perfect candidate for this position. During the 2006-2007 school year, I held two, very different, long term substitute positions. My first position was at _________________________ where I began the year teaching seventh grade science. I was grateful to be a part of the first year of their blended program for special education students. It was during this time that I was successfully able to co-teach with a special education colleague. The second position I held was with the ______________Alternative Middle School and Long Term Suspension programs. It was there that I had the opportunity to work with many at risk students, both at the middle and high school levels. I was able to provide excellent classroom management as well as an engaging learning environment in this alternative setting.

it has an opening and a closing paragraph with my info.. but it just wasn’t necessary to post here…ok let me know..
THANK YOU!

here is my revision… PLEASE let me know what you think!  I love that I am getting input from so many on this.  It makes me feel confident that I will have a great letter!

I am writing to apply for the position of science teacher within the _____________District. I have completed my Master of Science in Secondary Teacher Education and have received NYS Initial certification in both biology and general science for grades 5 through 12. A review of my credentials will showcase my passion for science and my commitment to share this passion with students.
 
I feel my diverse experience, which includes work with alternative education students and co-teaching with a special education teacher, make me an ideal candidate for this position. During the 2006-2007 school year, I held two very different long term substitute positions. My first position was at ________________________where I began the year teaching seventh grade science. I enjoyed being part of the first year of their blended program for special education students. It was during this time that I was successfully able to co-teach with a special education colleague. The second position I held was with the __________Alternative Middle School and Long Term Suspension programs. It was there that I had the opportunity to work with many at risk students, both at the middle and high school levels. I was able to provide excellent classroom management as well as an engaging learning environment in this alternative setting.

I might as well ask this too, on the application for this particular school district they ask you to "list below any additional points which will help in judging your suitability for a position, such as your aims, your special experience, training, talent or interests…..

should i actually list??? as in bullet points??  doesn’t seem too professional to me.. or should I write a short "essay".. just curious as to whether I should "follow the directions to a T"