Arrow symbol indicates correct answer. Geometry One of the most difficult geometry items assessed understanding of the properties of congruent triangles. Internationally, the average percentage of correct responses was 35 percent for the eighth grade. These triangles are congruent. The measures of some of the sides and angles of the triangles are shown.
Arrow symbol indicates correct answer.
These two examples required the students to work with algebraic expressions and equations. It is not surprising that students had even more difficulty identifying the correct expression to represent the number of Clarissa's hats in the next example. International performance on this item averaged 47 percent at the eighth-grade level. Note that the U.S. student scores did not reflect the international ranking for these questions. More U.S. students answered the hat question correctly than the question about equivalent expressions.