You can wrap any amount of sentences with a shortcode allowing people to click on those and allow them share on twitter with a link back to the article source and via the site name.
- I have activated the plugin – what now?
[tweet]between the text you want to highlight for people to share
- 0.1 Shortcode plugin creation
- 0.2 Strip tags in between shortcode
- 0.3 Twitter post box opens in new tab
- 0.4 Optional twitter bird appearing after the tweet