Line Spaceing

– Your current “education-pro” theme is not in the WP official theme repository.
– Therefore, you’ll be more likely to find a good answer from your theme’s developers, for they have the access to its code. http://codex.wordpress.org/Forum_Welcome#Commercial_Products

Meanwhile, try many tools available for this kind of CSS work, for example:
– Firefox with Firebug add-on: Help info on Firebug https://getfirebug.com/faq/
– Newer IE/Chrome, etc., have similar tools
– Also, check out Custom CSS Manager plugin: http://wordpress.org/plugins/custom-css-manager-plugin/
– Alternately, try a dedicated CSS resource such as http://www.css-discuss.org/