Logo in edublog theme

Hello everyone, its a pleasure to be in the company of so many "brilliant minded" people. I am quite a novice at this so please bear with me.

I just wanted to know how to place my site logo on the front page. There's just a link with the name of my site there currently. I am using the edublog theme. I am unsure if its the header.php folder that I need to make changes to? If it is then what changes do I need to make? I have uploaded my logo to the images file and named it site-logo.

I have looked at the previous post about the logo issue but it hasn't answered my question. Any help will be greatly appreciated.