The increasing maturity of the sixth graders allows them to strengthen their command of number facts and practice basic operational algorithms. The core math curriculum includes heavy review of previously studied topics such as estimating, rounding, decimals, fractions, and problem solving. Students also apply the formulas for perimeter and surface area for basic figures.
Students examine the transformation from bartering to money-based economies. They also learn to calculate percentages to pay taxes, find the value of a discount, and understand the power of compounding interest.
Constructing geometric figures using a compass and straightedge is an exercise in precision and artistry that allows students to understand mathematic relationships in a visual, kinetic, and artistic way. In addition to creating geometric progressions of polygons and spirals, students learn the laws of complementary, alternate, and opposite angles. A formal geometric proof is introduced for the first time: the sum of the angles of a triangle equals 180°, an exercise that bridges the transition to an in-depth study of the triangle.