Today i will talk about my dream.everyone has a dream, inchuding me
Building a school and to be the headmaster is my dream. In the school,there are plenty of grass and trees.there also has the dormitories(宿舍),a piayground,a dining hall and a library.if this school just like others ,it will not be meaningful,to your surprise, each grade only has one class,you can choose any class you like ,you can even not go to school.but you must get the mark which i require,unless you may be leave the school.
in the dormitory, there are no bells,if you want to get up late, don not be worried about no one will punish you. you can ride a horse to go to school,the teacher will watch films to wait you.
whenever you have problem, you can ffind me to help you ,i will try my best.
if school life just this, it must be boring.i wll organize my student to go to many places of interest in our city or go to the theatre to watch the latest film.
i hope all my students will be happy in my school ,not like a robot. i think it is not mark which you achieve but skill which you learn that count(我认为重要不是你得到的分数二是你学会的技能)
because it is so crazy that there is no possibility(可能性) that(引导同谓语从句) comes true,it only mt dream in my heart
that`s all. thank you!

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　　修改：
1.i began (加 to ) understand how to use it.

2.get informations i need (加 and 连接）save files...

3.i'm going to study harder to achive my dream.(就这里加点儿)：i know it is not easy to make my dream come true.if i want to be an excellent computer programmer, i must have a lot of knowledge.being good at english is also very important. i have made a plan that how i should study better.i am going to read english every morning.i must get good grades in all subjects.
what's more, i should be healthy.so i should take exercise every day.
多的来了。