I bought the scarf in Year 7 as my son really wanted one, and it has never seen the light of day!
Best buy - The blue coat with STRS on the back. It lasted until the of middle Year 9 . Quite expensive, but well worth the money.
Must have - Long sleeved games shirt (reversible)
Navy rugby shorts.
If like mine, they are in the rugby teams, then multiples of the shorts and socks, as you will be washing them regularly ( 2-3 times a week) .Plus skin shorts, skins, gumshields and a Junior size kit bag to carry it all in.
Must have - White P.E top
White shorts ( mine has Nike football style shorts)
Must have - Navy swim shorts, close fitting type .
Lastly - A rucksack is a must I think, rather than a messenger style bag.
They have a lot of text books and exercise books to carry every day; plus lunch box, pencil cases, water bottle etc, and we found that a messenger style bag just wasn't
up to the job.
The weight can be quite heavy, so a rucksack is a bit easier on the back too.
Hope this helps.