Error: Options Page Not Found

Theme: 2012

Hello!

I am not sure why the options page fails to be shown. Here is the code used to build the page. In reading the codex it seems either I need to add a line somewhere (not sure what or where) or the examples I was following to help build my plugin are out-of-date and therefore the entire section needs to be rebuilt. Any guidance would be helpful.

//action hook to add the post product menu item in the admin dashboard
add_action('admin_menu','school_store_menu');

//create submenu item
function school_store_menu() {
	add_options_page (__('School Store Settings Page', 'school-plugin'),
		__('School Store Settings', 'school-plugin'),
		'manage_options', 'school-store-settings', 'school_store_settings_page');
}

//build plugin settings page
function school_store_settings_page()  {

	//load the plugin array option
	$ss_options_arr = get_option ('school_options');

	//set the option array values to variables
	$ss_inventory =(! empty ($ss_options_arr['show_inventory'] ) ) 

	? $ss_options_arr ['show_inventory'] : '';
	$ss_currency_sign = $ss_options_arr ['currency_sign'];
?>
<div class="wrap">
<h2> <?php _e ('School Store Options', 'school-plugin') ?> </h2>
<form action="options.php" method ="post" >
<?php settings_fields ('school-settings-group'); ?>
<table class="form-table">
<tr valign="top">
<th scope="row"> <?php _e ('Show Product Inventory', 'school-plugin') ?> </th>
<td> <input type="checkbox" name="school_options[show_inventory]" <?php echo checked ($ss_inventory,'on'); ?> /> </td>
 </tr>
 <tr valign="top">
 <th scope="row"> <?php _e ('Currency Sign', 'school-plugin') ?> </th>
 <td> <input type="text" name="school_options[currency_sign]" value="<?php echo esc_attr ( $ss_currency_sign); ?>"
 size="1" maxlength="1"  />  </td>
 </tr>
 </table>

<p class="submit">
<input type="submit" class="button-primary" value="<?php _e ('Save Changes', 'school-plugin') ?>" />
</p>
</form>
</div>
<?php
}