Math by Topic Sampler

Lesson Plan for Student Book AII, Page 4 Student Book O BJECTIVES : To act out addition problems. To draw pictures and write number sentences involving addition. To develop an understanding of addition as combining or putting things together. I NTRODUCTORY A CTIVITIES Acting Out Addition Problems Today we will have some students act out a problem. Acting out a problem is one of the best ways to understand what is happening. Name 2 students and ask them to stand at the door. Name 3 students and ask them to stand by a window. Ask the students to all come together at the desk. How many students are at the desk? (5) Have a student describe this problem in her own words. (Two students stood at the door; 3 students stood by a window. All the students came together at the desk to make 5 students in all.) Continue with more addition activities using new situations, students and numbers. Recording the Problem After students have acted out and described several problems in their own words, show 2 different ways of recording action action in an addition problem – by drawing pictures and by writing number sentences. In the example from the previous activity, stick figures could be drawn with a line between the beginning of the problem and the end. To help students write a number sentence for the problem, use the following question: Can you think of a word or words to describe the action in these problems? (putting things together, joining, combining) Problems that combine or put things together are called addition problems. We use a special sign – the plus sign – to show addition. Write on the board: 2 + 3 = 5 When you see a problem like this, think about the problems we just acted out so you will understand what addition means. Continue with more examples of addition problems as you record them. Have students bring 4 math books and 2 math books to a table. How many books are on the table? (6) Write a number sentence for the problem. (4 + 2 = 6) A BOUT T HIS P AGE Have students act out and record the correct sentence for each problem. F OLLOW U P A CTIVITIES Have students create their own addition word problems from number sentences that you write on the board, e.g. 5 + 2 = 7. Make up a word problem about this number sentence. Write the story on the chalkboard as it is told. Draw a picture of the story written on the chalkboard. 1 + 3 4 2 + 4 6 4 5 4 Answer Key 26 L E V E L A g r a d e s 1 – 2 Explicit, Conceptually-Based Instruction: add, put together, combine * Not all lessons follow this format Visualize 2 Reinforce 3 Introduce > Explore 1 1 Level A Teachers Manual 4