1171 Scuba Diving in Belize Resource Type: Instructional Resource -- Best Practice Discipline: Mathematics Ohio Standards Alignment: Grades 3–5 Professional Commentary: In this 5-lesson unit, students take a pretend scuba-diving trip to Belize. They explore various real-world applications of time and distance measurement, make estimations and calculations, and use online resources to plan the trip. In the first lesson, students view several websites and determine what mathematical ideas and concepts are involved in scuba diving. In the second lesson, students use various resources to choose travel dates, compare temperatures, estimate and calculate distances to Belize City, and determine the length of their flight.... 1172 Squares on a Triangle 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.... 1173 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.... 1174 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.... 1175 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.... 1176 Bouncing Ball -- Function Families Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 8–11 Professional Commentary: In this lesson, students explore quadratic functions using a motion detector known as a Calculator Based Ranger (CBR) to measure the heights of the different bounces of a ball. Students represent each bounce with a quadratic function of the form y = a (x - h)2 + k.... 1177 Hot Dog Sales - Solving Linear Equations and Inequalities Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 5–8 Professional Commentary: Students solve a practical problem involving a linear function using three different methods: numerically from a data table, graphically, and algebraically. They find the number of hot dogs that must be sold to break even and then how many must be sold to make a specified profit. Connections between the three methods are a major focus of the... 1178 The X Factor - Trinomials and Algebra Tiles Resource Type: Instructional Resource -- Best Practice Discipline: Mathematics Ohio Standards Alignment: Grades 7–10 Professional Commentary: This lesson focuses on connections between the factors of quadratic polynomials of the form x2 + bx + c, algebra tile representations of the factorization, and roots of the quadratic function. Students use algebra tiles to identify binomial factors and then use the graphing calculator to verify the result.... 1179 Bigger and Smaller - Exponent Rules Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 6–8 Professional Commentary: This lesson has two parts. The first activity leads students to appreciate the effect of repeated doubling, using the classic checkerboard scenario.... 1180 Be Direct - Oil Spills on Land Resource Type: Instructional Resource -- Promising Practice Discipline: Mathematics Ohio Standards Alignment: Grades 7–11 Professional Commentary: This lesson teaches students about direct variation by allowing them to explore a simulated oil spill using toilet paper tissues (to represent land) and drops of vegetable oil (to simulate a volume of oil). The lesson involves mathematics concepts ranging from area and volume to graphing, linear regression, and lines of best fit. Included with the lesson are... |