Embedding interactives and other iframe content in a post or page can be problematic since WordPress strips out scripts and iframes. Pym Shortcode is a WordPress plugin built by INN to allow embedded content using a simple shortcode. It will also responsively resize both the width and height of an iframe to fit smaller screen sizes on mobile devices.
After installing and activating Pym Shortcode, you can simply use a shortcode like this:
[pym src="http://blog.apps.npr.org/pym.js/examples/table/child.html"]
There are no plugin settings, but there are some requirements for the embedded content. For full documentation see the Pym Shortcode docs on GitHub.