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teaching number lines 2nd grade

Model how to make jumps forward to solve addition problems. Each set makes everything so much easier to plan and organize. Since this 2nd grade standard has students working with numbers within 100, they must be able to represent and label these numbers on a blank number line first. Students, with their partners, will show the number lengths of the red rod up to the orange rod by placing the corresponding number of units (white rods) directly next the chosen colored rod, demonstrating the connection between length and number. This can be used to measure the other rods to determine the number of small rods make up the longer rod. Students in first and second grade will be using what is called the number ray which is the positive half of the number line. When teaching number line strategies, practice makes perfect! First, it is important to introduce the concept of a number line so that students can study it’s attributes and uses. Cooperative Learning: The students will be given opportunities to work as cooperative groups to use the number line as the tool to show addition and subtraction as distance. When introducing number lines to your students, it is helpful to begin with visual anchor charts. Math in Focus Singapore Math by Marshall Cavendish. Demonstrate with a larger version, that if we cut the “decades” apart, we can create a 100-number line instead. This page includes the best top 10 2nd Grade Number Lines Kids Activities we have on our site. The Standards for Mathematical Practice describe varieties of expertise that mathematics educators at all levels should seek to develop in their students. Our district mathematics curriculum for Kindergarten through Grade 5, Math in Focus Singapore Math, is one based on the highly successful mathematics instruction model which introduces students to concepts through the CPA approach – using concrete, then pictorial, and finally abstract activities to introduce, practice and master mathematical concepts. How are they different? The next steps of this activity combine the understanding from Activity Two, the Commutative Rule. I’m thrilled you’re here! Carefully walk through each step of this problem with students using their collection of base ten blocks. Students use math to solve real-world problems, organize data, and understand the world around them. During this time, I like to have my students use red to show addition jumps and blue to show subtraction jumps. Begin by demonstrating simple addition problems on a closed number line beginning at 0 and ending at 10 or 20. This process allows you as the teacher to assess a students’ knowledge of the number line strategies. With this mission, the teachers and students use unique and exciting approaches to “the basics” and work together to ensure that all students are learning successfully. To add together two-digit numbers, the 10 rods and cubes can be lined up in trains arranged in the standard arrangement, 10-rods on the left and cubes on the right. Guiding questions to ask as students explore:  How many units does it take to make this length? The instructor will call out numbers and students will demonstrate understanding by placing rods and unit cubes on the line, 10’s first followed by ones. This process helps students develop a connection between counting and length; a good start to the concrete step of learning. Mini-lesson: Present the Cuisenaire rods to the students. Placing rods end to end creates a new length (addition) and comparing two different lengths by putting rods side by side illustrates the difference (subtraction). All of the images you see throughout this blog post come from the 2.MD.6 unit on number lines and open number lines. Model with mathematics.

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