Here are a few quick thoughts:
Capitalize Catholic and God.
Put the period on the inside of the quotation marks (you have tucked one in, but there's another outside of the quotation marks).
. . . before I became a sophomore in high school . . . this feels a little awkward to me. Maybe reword it to something like: the summer before my sophomore year. If you are applying for college, they can safely assume that you have only had one summer before one sophomore year and that was in high school.
has taught me
a lot of important values . . . getting rid of the word
has strengthens the verb while omitting
a lot of tightens things up.
A lot of is vague and doesn't add anything to the sentence.
T
r ying things
there
'sare service projects (but Simone
's fix is better).
Tying things like parasailing and obstacle courses to learning about my relationship with god, and others made it easy for someone my age to realize the potential they have in becoming a part of today's society.
This is one of sentences that Simone was talking about with weak verbs. You also have some issues here with the first part of the sentence not being tied to the rest of the sentence. It needs some rewriting.
Throughout each school year, leaders get to know teenagers at a more personal level to get to know who we are and help us to mature both as Christians and simply adolescents.
You repeat "get to know." I am not crazy about this sentence, but I am not sure how I would change it at this point either.
Listening to personal experiences from both people that I know and people that I have yet to really meet help me to appreciate what I am given and teaches me that even though I am one out of six billion people in the world, I have the ability to "dig up my own hidden treasure" be making an impact on the society and environment around me.
This sentence has quite a few extraneous words in it. Try something like: Listening to the personal experiences of others helps me to appreciate life and teaches me that as one person out of six billion in the world, I have the ability to "dig up my own hidden treasure" and impact society and the environment around me.