In the United States, the grades in primary and secondary school are usually referred to as follows:
Kindergarten (K)
First grade (1st grade)
Second grade (2nd grade)
Third grade (3rd grade)
Fourth grade (4th grade)
Fifth grade (5th grade)
Sixth grade (6th grade)
Seventh grade (7th grade)
Eighth grade (8th grade)
Ninth grade (9th grade) (also known as "Freshman" year in high school)
Tenth grade (10th grade) (also known as "Sophomore" year in high school)
Eleventh grade (11th grade) (also known as "Junior" year in high school)
Twelfth grade (12th grade) (also known as "Senior" year in high school)
In the United Kingdom, the grades in primary and secondary school are referred to as follows:
Reception
Year 1
Year 2
Year 3
Year 4
Year 5
Year 6
Year 7
Year 8
Year 9
Year 10 (also known as "Fourth Form" in some schools)
Year 11 (also known as "Fifth Form" in some schools)
Sixth Form (two years, typically ages 16-18)
In Austrapa, the grades in primary and secondary school are referred to as follows:
Prep (also known as "Kindergarten" or "Foundation")
Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Grade 6
Grade 7
Grade 8
Grade 9
Grade 10
Grade 11
Grade 12
In Canada, the grades in primary and secondary school are referred to as follows:
Kindergarten
Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Grade 6
Grade 7
Grade 8
Grade 9
Grade 10
Grade 11
Grade 12
In most countries, the education system is similar, with primary school starting at around age 5 or 6 and ending at around age 11 or 12. Secondary school typically starts at around age 12 or 13 and ends at around age 17 or 18.