CHECKBOX in cells

Hi

I am trying to place checkboxes in multiple cells (for an attendance tracker) but would like to do this without using the developer tab and Form Control (but using Cell Control). I would simply like users to click on the checkbox (which puts a tick in it) as I have a final column which calculates a % of how many ticks ie. completed tasks. I don't think I can calculate percentages if I use Form Control via the developer tab.

I cannot find anywhere on my version of Excel how to do it. There used to be a 'checkbox' option (next to comment, link etc.) when you clicked on the INSERT tab on the Excel ribbon but it's not there now.

I have tried other ways like data validation but there's no option for checkbox on that either.

Can anyone help me? I've attached an image of where the CheckBox is/was supposed to be ... but it's not on my ribbon.

TIA