DescriptionThis is the second clip in a series of seven of building towers four tall problem using red and blue unifix towers. Brian suggests a new tower with two blue and two reds. Jeff said he would build the opposite. Brian then realized he already had that tower, so Jeff eliminated the opposite tower without also checking. This implies that Jeff may have been building the towers in relation to their opposites and assumed all towers in that collection had an opposite tower partner already. The video data is not clear to see the towers they had, so there is no evidence that they were built by opposite arrangements. Brian read part of the problem statement and realizes “using two colors” meant that each tower should have two colors. The researcher came over and asked him to read it again carefully. Brian realizes it stated, “one or two colors.” The researcher praised him for reading it carefully and saying something about it to Jeff. They continue to try to build new towers. Brian finds out the next group have sixteen towers and tells them they have “over eighteen.” They were asked by the researcher how many towers they have but they are not sure towards the end of this clip.