What should I write in the 'additional information' section of the common app?

Applying to College
1

<p>I have three things in mind:</p>

<p>1) Some more extra curricular activities as the common app allows only 10.
2) About my extended essay ( I am an IB student)
3) I messed up my bio and math grades because I was ill during that period. An explanation about those grades.</p>

<p>Which one will look better? Can I put all the tree of them in the same place? thanks</p>

2

<p>1) Yes, if they’re significant, but not just for filler.
2) I’m not sure why you would write about an essay, or why being an IB student is important. Can you elaborate?
3) This is better addressed by your HS GC in the SSR.</p>