get_template_directory_uri pointing to parent theme not child theme

You should move your custom templates, those that are not controlled by the active theme, to a child folder.

Keep the theme separate from all customized files this way the theme can be updated without losing your custom work.

Your out-of-the-box theme lives here
------------------------------------
\\Site\wp-content\themes\some_theme

Your child theme lives here
---------------------------
\\Site\wp-content\themes\some_theme-child

Your custom styles and templates and all your includes (things like custom javascript , images that are not saved to WP, custom fonts, json data files, and any plugins that you might enqueue) should be moved to child folder OUTSIDE of theme.

\themes\some_theme
\themes\some_theme-child\ (all your custom php template files here)
\themes\some_theme-child\images
\themes\some_theme-child\includes 
\themes\some_theme-child\languages
\themes\some_theme-child\json 
\themes\some_theme-child\style

For your custom style pages ( not the theme's overridden style.css ) enqueue with wp_enqueue_style( 'some-css', get_stylesheet_directory() . '/style/some.css' , false, '0.0.1', 'all');

Use get_stylesheet_directory_uri() with your xhr calls, etc.

get_template_directory_uri() will always return the URI of the current parent theme.

To get the child theme URI instead, you need to use get_stylesheet_directory_uri() .

You can find these in the documentation, along with a list of other useful functions for getting various theme directory locations.

If you prefer to use a constant, then TEMPLATEPATH is akin to calling get_template_directory() (i.e. the parent theme), and STYLESHEETPATH is akin to calling get_stylesheet_directory() (i.e. the child theme).

These constants are set by WordPress core in wp-includes/default-constants.php and basically look like this:

define('TEMPLATEPATH', get_template_directory());
...
define('STYLESHEETPATH', get_stylesheet_directory());

If there is no child theme, then both the 'template' and 'stylesheet' functions will return the parent theme location.

Note the difference between these functions and the functions ending in _uri - these will return the absolute server path (eg. /home/example/public_html/wp-content/yourtheme ), whereas the _uri functions will return the public address (aka URL) - eg. http://example.com/wp-content/themes/yourtheme .

Replace

include (TEMPLATEPATH . '/path-to/my-file.php');

with

include dirname( __FILE__ ) . '/path-to/my-file.php';

this should work for most common issues