be considered a guess for some students because they might lack the reference or information to make a reasonable estimate. that's totally understandable. when we enter the second day of an estimation 180 series, students have an anchor challenge they can refer to now. therefore, i believe it's reasonable for us to expect students to consider what they already know from the first day and use that information for making a reasonable estimate on the second day. so when we go to show the video reveal, there's more to it than just watching the video. let's discuss percent error. watch tis video to see what i mean. i think you're 