Data on students' mathematical communication skills: A quasi-experiment

The data were collected by observing students in class, administering a pre-test, and following up with a post-test. Before learning about ellipses, the students in two different classes were given a pre-test consisting of six circle questions, which they had been instructed to review in preparation for the next topic. A description with six elliptic equation-related items served as the post-test instrument in this study. The questions on items 4 and 5 related to actual carpentry and architectural design issues were particularly difficult. When working through these mathematical challenges, it was reasonable to anticipate that students would require adequate mathematical communication skills