Here is a link to the EEF toolkit with a wealth of information on educational research that has happened, that is going on now and that is coming up. This is the toolkit with an easy to follow summary of research and also there is a link to the marking and feedback report published recently.

https://educationendowmentfoundation.org.uk/resources/teaching-learning-toolkit/

Click to access EEF_Marking_Review_April_2016.pdf