Cannot get jQuery to function in WordPress.

I am currently working with a fresh installation of the Starkers theme and I am unable to get jQuery functioning within the template. I am using wp_enqueue_script(“jquery”); before the wp_head(); call. When I view the source of my frontpage I can click the link to the jQuery library so the page appears to be correctly referencing the library, but when I try to incorporate any jQuery code into the site it is nonfunctional. I will include my header.php code here:

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