I have been using Mathematics Vision Project materials for four years now, and I was very excited about the updates and watched for them all summer long. Sample units of Open Up High School Mathematics were released, and my coworkers and I started digging into the newly published resources. In early August, we were at last able to see the curriculum unfold on the Open Up Resources site. I started going through Open Up High School Mathematics with my coworkers to scope out the updates. We compared the MVP materials to the new Open Up High School Mathematics resources… lesson by lesson, practice by practice. Some of the team was very trusting – any new changes to the material must be amazing because MVP is already amazing. We continued to dig deeper into the content updates in the lessons and the practice assignments, and we discussed and agreed that all of the changes were improvements and would likely help more students comprehend and master the material. Our team found that...