The only one which is not possible is the third one: this is because it has a completely different meaning. 'Years' does not refer to the pupils' ages: if you were to say 'Pupils in years 9 - 13' in a British context, we'd understand this to mean school years. UK Year 9 is equivalent to the French "quatrième", so 'pupils in years 9 - 13' would be the equivalent of students from 'quatrième' to 'terminale'. The other wordings are more or less correct, with a few changes: For pupils between 9 and 13 years old For pupils from 9 to 13 years old For pupils who are aged between 9 and 13 years old For pupils who are between 9 and 13 years old or, more concisely: For pupils aged 9 - 13 By the way, I agree with Hiroshi that 'pupils' is rarely used these days. It sounds very old-fashioned: nowadays, we tend to say 'students' rather than 'pupils'. In a historical context, we might say 'pupils', but we tend not to use it for a modern context.

1) For pupils between 9-13 years old 2) For pupils from 9-13 years old X For pupils in years 9-13 (don't use this one) 3) For pupils who are aged between 9-13 years old 4) For pupils who are between 9-13 years old 5) For pupils who are between the ages 9-13 Usually if the word "years" is placed after the age number then you should also add the word "old" = # years old. Also, the word "pupils" is correct, but is not a commonly used word. Maybe "students" is better depending on the context. Hope that's helpful!

Thanks for your suggestions.

I live in the US, and I would write: For pupils between 9 and 13 years old For pupils between 9 and 13 years of age For pupils from 9 to 13 years old For pupils 9-13 Although we do use the word "pupils," I think that "students" is more common here. I would also avoid "For pupils in years 9-13" because it isn't clear whether you mean age or year of schooling.