http://en.wikipedia.org/wiki/Honors_student
http://en.wikipedia.org/wiki/Dean's_List

Ayşe has ranked 3rd in the list of the most successful in a class of 85 students and is a Honors student (veya and is on the Dean's List).

Ayşe, başarı sıralamasında %10'luk dilimde ve 85 kişilik sınıfta 3. sırada yer almaktadır.

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Note added at 23 mins (2008-03-09 13:38:01 GMT)
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Honors Student
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An honors student is a student in elementary, middle, or high school recognized for achieving high grades, specifically grades that equal on the GPA scale of 3.0 or higher.

Honors students are recognized on lists published periodically throughout the school year, known as honor rolls. Roll vary from school to school, and from different levels of education. Elementary and middle school levels generally require a B average in all classes (which converts to a 3.0 on a standard 4.0 GPA scale). In high school, expectations are typically a little higher, generally requesting a B+ average in all classes (a 3.333 out of 4.0). However, these grades are certainly not absolute - schools can set their own standards for honor roll requirements (this usually happens when schools have weighted grading systems).

Honors student may also be used to refer to a student who is pursuing an honors diploma in high school, which requires much more rigorous courses (even AP level) than the standard or lower ranked diplomas and also usually require at least a C or better average to qualify for the honors diploma.

Some schools enact an honorable mention list in addition to the honor roll. Honorable mentions typically list students who fell just short of the honor roll expectations.

Honors students are often rewarded for their achievements. A typical student who has made numerous appearances on the honor roll is awarded with some form of academic letter.

A similar concept to honor rolls exists in colleges and universities in the United States, known as the Dean's List.

Dean's List
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A Dean's List is a category of students in a college or university who achieve high grades during their stay in an academic term or academic year. In secondary schools, or high schools, the term Consistent Honor List or Honor Roll is preferred, but Dean's List and Consistent Honor List mean exactly the same thing. A less common term, yet still meaning the same thing, would be the Chancellor's Award.

In schools which start their grading system having 5.0 the lowest and 1.0 the highest, 2.0 is often the Dean's List cut-off point. In schools which start their grading system having 1.0 the lowest and 4.0 the highest, 3.0 is often the Dean's List cut-off point. At universities this requirement is usually higher; an A- average for the term is typical (3.50 or better on a 4.0 scale). The required grade point average is often the same as the required average for Latin Honors.

Different from an academic scholarship, the Dean's List Award does not come with any financial aid. However, placement onto the Dean's List often allows one to take additional for-credit courses over the credit limit, without having to pay extra tuition.

Ayşe takes the third place in the success ranking of her class of 85 students, thereby falling into the 10% segment.

3rd out of 85.

Ayşe, başarı sıralamasında %10'luk dilimde 85 kişilik sınıfta 3. sırada yer almaktadır.
Ayşe stands third in her class among 85 students within the 10% segment of overall gradings

self-explanatory

self-explanatory

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Note added at 298 days (2009-01-01 15:38:51 GMT) Post-grading
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From the achievement list, Ayşe ranks 3rd place within the
10% 85 - person classroom segment.