Third grade of high school, finally finished.

Last week, I finished third grade of high school. I feel very good about of it. There is one more school year and then I can go to college. Now I have vacation for two months, but I have to go back to school in September.
Finally I can do all of my hobbies which I do not have time for during the school year.
Sometimes I joke and say that, when students have a vacation, it is like someone just got out of prison and suddenly does not know what to do with all of the freedom. We are on summer vacation for a long time, and I have a lot of plans on what to do during the holiday. However, when the holidays finally come around, most of us do not know how to organize our time so many plans do not become a reality. 
This summer, I decided not to be lazy and to organize my time better. I want to learn Japanese and improve my Italian and English. I might find my old Latin book and try to remember things I learned earlier. Of course, I will not learn all the time. I will also watch some movies and do aerobic, which is one of the my most important hobbies. It helps me to lose some weight and also stay healthy.
Next school year is very important for me because I have to decide which college to enter. I hope my decision will be good but, for now, let's enjoy the holidays.
P.S For all students who are on vacation: Put on a smile and have fun! After one year of studing you deserved it. :)

This is really nice! You've included a lot of detail and it's mostly very accurate. I hope you have fun on your summer vacation! (I still have three more weeks of school to get through, though.)

Hope you find time to improve your English! So far, so good. 

Third grade of high school, finally is finished

Last week, I finished third grade of high school. I feel very good about because of it. There is one moreschool year more and then I can go to college. Now I have vacation for two months, but (ovde bi  čak i na srpskom jeziku bilo bolje sa "ali" umesto "i") and I have to come back to school (jer označava pravac kretanja.  Nije isto kao u Srpskom jeziku. Ako želiš, mogu ti to objasniti na skajpu)  in school in September.
Finally I can do all of my hobbies for which I do not have time for during the school year.
Sometimes I joke (ili "make jokes" - Ne možeš reći "I am kidding" ako imaš "sometimes" jer "sometimes - ponekad" označava radnju koju se ponavlja. Dakle, mora biti "simple present tense. ).  am kidding and say that when students have a vacation,  it is like someone came back from just got ot of the (ne treba ti ovde "the" jer nije određeno koji tačno zatvor je u pitanju nego si rekla uopšteno "zatvor") prison and suddenly does (mora "does" pošto je "neko" 3.l.j.) not know what to do with all of the at freedom. We've been are expecting summer vacation for a long time and now we have a lot of plans on what to do during the holiday. However (čak bih i ja rekla ovde na srpskom "međutim" umesto "ali") but when holidays it finally come around s most of us do not know how to organize our time so many plans do not become a stay not reality (U engleskom se jako retko koriste aktivne forme rečenica, više se koristi pasiv. Glavno pravilo za engleski: koristi što kraće i što jasnije rečenice. Nemoj da pokušavaš da to ulepšavaš kao što to radimo mi u Srpskom ili kao što bismo to radili sa španskim jezikom...nema potrebe i samo ćeš napraviti puno grešaka)  zed.
This summer I decided not to be lazy and to organize my time better. I want to learn Japanese and improve my Italian and English. Might I might find and then (znam da si htela reći "Možda ću uzeti" ali ne možeš tako bukvalno da prevodiš. Ovaj oblik kao što sam ti napisala bi u Srpskom jeziku bilo "Ja možda ću naći i uzeti knjigu latinskog", ali naravno to nije u duhu Srpskog jezika. Nadam se da shvataš poentu. ) will take my old  ofbook Latin book and try to remember things I learned earlier. Of course, I will not learn all the time, I will also watch some movies and do aerobic, which is one of the my most important hobbies. y for me. It helps me to lose some weight and also stay healthy. 

Next school year is very important for me because I have to (ovde je bolje da se upoterbi "have to" kao "morati" umesto "should - trebati")  should decide which college to enter. H I hope (ne izostavljaj lične zamenice, jer su one od izuzetnog značaja u Engleskom jeziku) my decision will be good, but for and now, let´s enjoy the in holidays.
P.S For all students and pupils who are on vacation: Put on a smile and have (ovde ti nije potreban nikakav član)  a fun!  on your vacation. After one year of studing you deserved it. :)

Dobro je, stvarno predivan tekst. Tvoje greške nisu tako strašne. Uglavnom praviš tipične greške koje pravimo mi Srbi kad učimo engleski. Mislim da ti je samo potrebna vežba. 

Želim ti prijatan dan.