There is a new article on D&D Wizard’s of the Coast website by Jeremy Crawford. Jeremy answers questions about Ability checks & Spellcasting. “CHECK” it out here:
http://dnd.wizards.com/articles/news/ability-check
Also, you can send questions for future installments: sageadvice@wizards.com.
Bio: Jeremy Crawford is the co-lead designer of fifth edition Dungeons & Dragons, as well as the game’s managing editor. He was the lead designer of the new Player’s Handbook and one of the leads on the Dungeon Master’s Guide. He has worked on many other D&D books since coming to Wizards of the Coast in 2007. You can reach him on Twitter (@JeremyECrawford).