Ohio Resource Center
 Toothpicks and Transformations: Quadratic FunctionsORC# 128Resource InformationResource Type: LessonsDiscipline: MathematicsGrades: Grades 9–11Professional Commentary: How many toothpicks does it take to make an n x n square composed of 1 x 1 squares? The lesson begins with a review of transformations of quadratic functions--vertical and horizontal shifts, and stretches and shrinks....MORE...
 ODE Assessment Item, Grade 10: Identify Graph of Quadratic FunctionORC# 5431Resource InformationResource Type: AssessmentsDiscipline: MathematicsGrades: Grades 8–10Professional Commentary: Students must identify the graph of a quadratic equation. This multiple-choice question is a sample item used in the 2005 Ohio Graduation Test (see Overview of Ohio's Assessment System)....MORE...
 ODE Assessment Item, Grade 10: Identify Equation That Represents a Table of ValuesORC# 5457Resource InformationResource Type: AssessmentsDiscipline: MathematicsGrades: Grades 8–10Professional Commentary: Students must select the equation that represents the relationship between values for x and y shown in a table. This multiple-choice question is a sample item used in the 2004 Ohio Graduation Test (see Overview of Ohio's Assessment System)....MORE...
 Hanging ChainsORC# 7715Resource InformationResource Type: LessonsDiscipline: MathematicsGrades: Grades 9–12Professional Commentary: Both ends of a small chain are attached to a board with a grid on it to form a catenary curve, similar to a parabola. Students choose three points along the curve and use them to identify an equation....MORE...
 Understanding Algebraic Factoring ORC# 2388Resource InformationResource URL: http://mathforum.org/alejandre/algfac.htmlResource Type: Content Supports -- Activities and rich problemsDiscipline: MathematicsGrades: Grades 7–12Professional Commentary: Algebra tiles are used to show the square of a + b, the square of a - b, and the product of a + b and a - b. The explanations are step-by-step and easy to follow....MORE...
 A Clever Method for Factoring TrinomialsORC# 10128Resource InformationResource Type: Content Supports -- Activities and rich problemsDiscipline: MathematicsGrades: Grades 8–12Professional Commentary: Here is an extension of some basic factoring methods. Although factoring has been lessened in importance in recent years, it is extremely helpful in maintaining algebraic skills and extending logical thinking and problem-solving skills....MORE...
 Maximizing Profits on Donut Sales ORC# 10177Resource InformationResource Type: Content Supports -- Activities and rich problemsDiscipline: MathematicsGrades: Grades 9–12Professional Commentary: Students determine a plan to maximize profit on a donut sale using data provided. The parabolic graphs of selling price vs....MORE...