The phrase "in different grade levels" is grammatically correct and can be used in written English
You can use it when describing something that varies across different levels or grades, such as education, abilities, or skills. Example: "The school offers specialized courses to accommodate students in different grade levels, from elementary to high school."
It was administered to 445 students in different grade levels and enrolled in several different faculties of Uludağ University.
We have presented a broad list of possible classes because students in different grade levels and in different areas may take different science classes.
The groups are assumed to be nonequivalent because they consisted of students in different grade levels with different reading abilities.
However, these declines cannot be accounted for by changes in the socioeconomic composition of students in different grade levels (Perkins et al., 2012).
Glendale High School students on Friday participated in Oratorical, a 103-year-old campus tradition of speechmaking and spirit in which different grade levels compete against each other in four categories, including original speech, tableau, discipline and class spirit.
Obviously, students in different grades might need different levels of assistance and scaffolding.
They would like to see examples of what Common Core standards look like in practice at different grade levels.
The levels of hTERT mRNA expression complemented well with the telomerase activity levels observed in different grades of cervical lesions to invasive cervical cancer samples.
Three practical assessments were conducted, morning (2 grade levels), lunch (3 grade levels), and evening (4 grade levels), with a total of 5 learning objectives resulting in different grades.
As the instrument for the class size, they used the average class size at different grade levels in a particular school.
The significantly different levels of mtDNA content in different grades of tumour may be accounted for either by the downregulation in mtDNA replication in the high-grade tumours, or upregulation in mtDNA replication in low-grade tumours.
