This is one of several SBG books I have read in the past couple of years. As with the others, I fear the focus on changing the format of report cards is a distraction from the work necessary in prioritizing standards, articulating success criteria, designing engaging instructional activities, using formative assessments effectively and efficiently, using and giving feedback to create corrective and enriching instructional activities, and then giving a quality summative assessment. That's the meat of improving instruction and what the report card ultimately looks like isn't as important to me.