Always cut to make writing better:
I continued to participate in the activities of my interest over the past few months. I
have noted in my application that I was appointed as the TDSB (Toronto District School Board) student delegate to the Better School, Brighter Future conference in November.
Perhaps you should add a new opening sentence in place of the one I cut (about continuing to participate in activities of your interest.
Over January and February, I gave a number of speeches at my high school and called out for the opinions of my fellow students (this part sounds choppy, right?).
No! Actually, this sentence is interesting; it leads me to visualize you in front of lots of students on many occasions. I almost want to recommend that you find a way to make this your opening line.
The opening line is so important, not just to catch the reader's attention but also to get you inspired to write.
I am excited
to discover that the need to understand and cooperate about
keeping pace with the changing doctrines of time and technology and
the need to about reaching out into the global network of today's (name of field of interest).
are not only the essences of a good educational system, but also the wisdom to achieving any long wanted successAfter this activity, I learned that a good school aims to establish partnership with outside institutions in order to afford its students a wider variety of opportunities (weired sentence?).
No, not weird, but I think it should be the first sentence of a new paragraph. Is this all one long paragraph? Use 2 or 3 paragraphs.
Furthermore , I became an equity ambassador in early April and proudly took on the mission to build a community in which all are
(is?) equal.
"are" is right. I hope you have success with this!! Sounds like you are a motivated, inspired person.