Formula to copy text from multiple rows in a column to one merged cell

[KClem]

I need a formula that lets me copy text from a range of cells into either one merged cell or preferably as a list. Someone writes in list format the following:-
A B C
2 Name Reading Writing
3 Laurell 11 8
4 Amaris 11 9
5 Paige 11 10
6 Miia 10 8

I need to have A3:A5 (all getting 11 into one group). I have attached a spreadsheet which i hope will help.

Thanks to anyone who can help.

[ChemistB]

Take a look at pivot tables. Insert tab>Pivot Tables

I moved reading and name to "Row Levels" and then right clicked on the results > "Field Settings"> "Layout and Printout > "Show Item labels in Tabular form"
See attachment

[JohnTopley]

Try ..in B13

=IFERROR(INDEX(Sheet2!A:A,SMALL(IF(Sheet2!$B$1:$B$29=Reading!$A$13,ROW($B$1:$B$29),""),ROWS($B$1:B1))),"")

Enter with Ctrl+Shift+Enter

Change BOLD range to reflect cell in column A containing number when entered in other cells