What is a sophmore & freshman ??

Im not from the US and was wondering what is a sophmore and a freshman? and
im guessing senior is above those two? what are the levels of high school ?
see where im from we just call it High School thats all...

Ok, the levels of highschool are.
9th grade = Freshman
10th grade = Sophmore
11th grade = Junior
12th grade = Senior.

After 12th grade begins college. Hope that helps :D

Yeah a lot, cause where im from its just high school and thats years 8,9,10,11,12 although year 11 & 12 is the senior years !! Thanks later

It might help to know that after high school, if you go to a 4-year college, the terms freshman, sophmore, junior, and senior are used again. They basically mean your first, second, third, and fourth year at a four-year school.

Freshman are the newest students, in their first year.
Sophomores are second-year students. (Sopho-more literally means 'wise fools,' like 'sophisticated moron;' these are the ones who think they know their way around but aren't very big yet.)
Juniors and seniors are the older students who are supposed to be more serious. Juniors have one year left before graduation, and
Seniors are the oldest students, in their final year.

These are mostly just names, an excuse to dramatize your place in the school. It's much more satisfying to tease a 'freshman' than a 'ninth grader.' A 'senior' sounds more impressive than a 'twelfth grader' or 'eighteen-year-old,' even though these are words for the same person.

If you are experiencing the US as an international student, you might want to know about some other high-school phenomena:
Often, US high schools have a junior and senior 'prom,' or fancy dance, near the end of the school year. Only juniors or seniors are allowed to buy tickets (though others may be invited as dates). For many students, Prom is very important -- who you go with, what you wear, and whether you embarrass yourself in the process can be discussed for months.

Homecoming is another big social dance, nearer the beginning of the school year. Two students, usually seniors, will be elected as 'homecoming queen' and 'homecoming king,' and may wear special costumes, ceremonially start the dance, ride in parades, etc. Homecoming usually follows a big football game, which the home team is supposed to win, in the fall.
(While we're on the topic, a 'Sadie Hawkins' dance is one where the girls are supposed to invite the guys.)

In the US, a lot of your social status depends on your own personal standing or popularity. The class you are in in high school, what sports you play, or what job you have, are more likely to impress people than who your family is, what religion you follow, or where you are from.
To escape this social trap, many young people (and adults) deliberately find friends who share a common interest outside of work or school, such as animals, art, theater, music, hiking, politics, church, or family.

um well see the first level is 9th grade so its called Freshman...then the 2nd level is 10th grade and its called sophomore and the third level is juniors which is 11th grade then the last level is 12th grade which is seniors the last grade in high school

9th grade -Freshman
10th grade - Sophmore
11th grade - Junior
12th grade - Senior.

I am a Freshman (all the people pick on the freshman :{ )