"Possibly Related Classroom Projects" enables you to share relevant classroom projects from DonorsChoose.org based on the content of your posts.
In order to maintain proper performance on your blog (and be as unobtrusive as possible), if the DonorsChoose.org API doesn't respond in a timely manner, the "Possibly Related Classroom Projects" plugin will essentially turn itself "off" for that particular post, for that particular page view. This sort of thing should occur very rarely.
Much like the above question, depending on the circumstances, if the DonorsChoose.org API doesn't respond favorably, the "Possibly Related Classroom Projects" plugin will react accordingly. Occasionally, that means it will display a previously cached result for that particular post, for that particular page view. This is done purely in the interest in maintaining your blog's proper load times. This sort of display should happen rather rarely, however.
The "Possibly Related Classroom Projects" plugin can be disabled for a particular post by using the tag %NOCP% somewhere within your post. The plugin will recognize and remove the tag while disabling itself for that post.
The "Possibly Related Classroom Projects" plugin uses the WordPress hook wp head (http://codex.wordpress.org/Hook_Reference/wp_head) to properly link the stylesheet included in its root directory. If the related classroom projects appear to be drastically different on your blog than on other blogs, the wp head hook is probably not being called from your template.
To check, please search for wp head() within your WordPress template. If it's not to be found, you can either insert it in the proper place within the template or add the CSS in ra style.css to the CSS for your WordPress blog.
Yes! The CSS file used can be found in the root directory of the plugin, ra_style.css. Feel free to edit it to your heart's desire!