<p> Meaningful Math Training K-2nd</p><p>Key Standards </p><p>M2G1. Students will describe and classify plane figures (triangles, square, rectangle, trapezoid, quadrilateral, pentagon, hexagon, and irregular polygonal shapes) according to the number of edges and vertices and the size of angles (right angle, obtuse, acute). </p><p>M2G2. Students will describe and classify solid geometric figures (prisms, cylinders, cones, and spheres) according to such things as the number of edges and vertices and the number and shape of faces and angles. b. Recognize the shape of an angle as a right angle, an obtuse or acute angle. </p><p>Secondary Standards M2P1. Students will solve problems (using appropriate technology). M2P2. Students will reason and evaluate mathematical arguments. M2P3. Students will communicate mathematically. M2P5. Students will represent mathematics in multiple ways. </p><p>Major Concept of the Unit: Geometry</p><p>Essential Questions for the Lesson: How do we classify angles? (acute, obtuse, right) How can we classify shapes by looking at angles? What are other ways to classify shapes? Which of the shapes have a right angle? Acute? Obtuse? Both acute and obtuse?</p><p>Meaningful Math Training K-2nd Meet The Angle Family</p><p>Task Description: Tell attached story about the angle family. After the story, tell students that we are going to figure out which types of shapes that Mother and Father Angle can eat. We can’t let them go hungry!</p><p>Direct Instruction for Whole Class: The whole class will be involved in the following learning experience: 1. Students will make an angle with straws and pipe cleaners. 2. Students will practice showing acute, right, and obtuse angles with their straws. 3. Students will play “Rhonda says”, making acute, right and obtuse angles with their arms. 4. Students will use paper protractor to again practice each type of angle.</p><p>Partner Work: 1. Using the pattern blocks at their tables, students will classify which shapes can be eaten by which member of the Angle family. 2. Students will then trace shapes onto graphic organizer. (Chart made by students) 3. Students will then label each angle on the graphic organizer with the correct labels.(acute, obtuse, right) 4. Students will then tally each type of angle in their shapes. 5. Students will graph the number of angles in their shapes. 6. Students will finally write a sentence or two telling what they know about acute, obtuse and right angles and how many of each they had in their shapes. Summarizer: Standing “recap”.</p><p>Methods of Assessment: Graphic Organizer Graphs</p><p>Meaningful Math Training K-2nd The Three Angles</p><p>Once upon a time there were three angles. (hold up the picture of each angle as you read about them) Mrs. Angle had A-CUTE little mouth. Mr. Angle had a big, or OBTUSE mouth. And their daughter Rhonda had a mouth that was perfect. Her dentist said her mouth was just RIGHT. One day, after returning home from the grocery store, the Angles walked into their kitchen to find a plum on their kitchen table. (hold up your thumb with the plum taped on the end) "Someone left this plum for me." Said Mrs. Angle. Then she tried to take a bite of the plum. Unfortunately, It was too big for her tiny mouth. (Hold the plum in front of the acute angle to show that it is smaller than a right angle.) "I know it is not for me." said Mr. Angle with his wide mouth. "It is too small for my big mouth." (Hold the plum in front of the obtuse angle to show that the right angle is smaller than an obtuse angle.) "This plum must be for me," said Rhonda. "It is just right." (Hold the plum in front of the right angle to show that the angles match.)</p><p>Meaningful Math Training K-2nd</p>