This document provides guidance on giving effective feedback and feedforward to graduate teaching assistants. It begins by defining the aims of the workshop as helping participants define feedback, recognize feedback principles, and develop skills in giving and receiving feedback through activities. It then covers identifying examples of feedback, attempting definitions of feedback, and discussing feedback purposes such as improvement and building confidence. The document outlines strategies for good feedback and challenges with providing useful feedback. It includes activities where participants practice different forms of feedback and discuss feedback experiences. In closing, it recommends feedback be a dialogue to support future learning.