Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 3–8 Professional Commentary: The Stomachion is an ancient tangram-type puzzle. Believed by some to have been created by Archimedes, it consists of 14 polygons (triangles, quadrilaterals, and pentagons) cut from a square.... 862 As People Get Older, They Get Taller Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 2–5 Professional Commentary: In this two-lesson unit, students measure the heights of classmates in 2nd grade and, for comparison, classmates in 4th grade. They make a table showing heights to the nearest inch and ages to the nearest half-year.... 863 Fibonacci Nim: Number Representations Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 9–12 Professional Commentary: This lesson reinforces understanding of place value by having students find numeral representations in bases other than 10. Students learn the repeated subtraction and repeated division methods for converting a decimal number N to a numeral in base b, provided b is an integer other than -1, 0, or 1.... Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 9–12 Professional Commentary: If you were standing on the top of Mount Everest, how far would you be able to see to the horizon? In this lesson, students will consider two different strategies for finding an answer to this question. The first strategy is algebraic—students use data about the distance to the horizon from various heights to generate a rule.... Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 8–11 Professional Commentary: In this lesson, students take on the role of villagers in a developing country trying to feed the village. While listening to the book One Grain of Rice read aloud, students work collaboratively to come up with a bargaining plan to trick the raja into feeding the village.... 866 Paying for Your Wheels Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 9–12 Professional Commentary: This lesson will be most appealing to students who are learning to drive a car. In this lesson, students consider the costs of owning a car and ways to lessen those costs.... Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 9–12 Professional Commentary: The Law of Cosines is an extension of the Pythagorean Theorem, but seeing how –2ab cos C fits into the picture can be difficult for students. In this lesson, students who understand the Pythagorean Theorem and right triangle trigonometry will discover the Law of Cosines by exploring the areas of squares on the sides of any triangle and their associated "defects." An activity sheet, an applet, discussion questions, suggestions for assessment, lesson extensions, and prompts for teacher reflection are included.... 868 Multiplication: It's in the Cards: Looking for Patterns Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 3–5 Professional Commentary: This lesson is the first in a 4-lesson unit focusing on beginning multiplication. In this first lesson, students skip count and color multiples on a 0-99 board.... 869 Multiplication: It's in the Cards: Looking for Calculator Patterns Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 3–5 Professional Commentary: This lesson is the second in a 4-lesson unit focusing on beginning multiplication. In this lesson, students learn to make their calculator or a web-based calculator skip count, and they use the results to begin filling in the basic multiplication chart. From the chart they notice that multiplication is commutative. The calculator applet, a worksheet of the blank multiplication chart, questions for students, suggestions for assessment, lesson extensions, and prompts for teacher reflection are included.... 870 Living on the Grid: Playing and Deconstructing Logic Games Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 6–12 Professional Commentary: This lesson focuses on problem solving and gaming strategies. Students work in pairs and small groups as they play and deconstruct the mathematical and strategic principles of logic puzzles, including tic-tac-toe and sudoku.... |