Teacher/author/disruptor Mark Barnes explains why traditional testing and assessment are not the same. Barnes shares excerpts from Hacking Assessment: 10 Ways to Go Gradeless in a Traditional Grades School, by Starr Sackstein, focusing on anecdotes from classroom teachers who assess learning through observation, feedback, reflection, and metacognition. Barnes challenges educators to find new paths to assessment. The conversation about assessment continues on Twitter at #HackLearning.