In order to individualize instruction, Holy Trinity School classes are kept to a specific number of students per grade level. This number allows the staff member to learn each student's needs and adapt the instruction to benefit the student. There are three kindergarten classes, two classes each of grades 1-8, three PreK-4, and one class each of PreK-2 and 3 classes.
For the school year 22-23 the class student limit per grade is as follows:

Enrollment as of October, 2022
PreK-2: 11 students 
PreK-3: 18 students 
PreK-4: 38 students 
Kindergarten: 45 
First Grade: 36 
Second Grade: 31 
Third Grade: 31 
Fourth Grade: 33 
Fifth Grade: 36 
Sixth Grade: 38 
Seventh Grade: 31 
Eighth Grade: 39