Below are links to the sources for the documents I recommended for reading.
The Main Idea, which provides education book summaries, is the source for Visible Learning for Teachers and Teach Like a Champion.
The insightAssess website is where you will find the information about feedback. This link provides an overview of that information.
insightAssess also provides the link to the Assessment for Learning website, developed by the Curriculum Corporation. This is the link to the information about learning intentions.