Lesson 11

The purpose of this warm-up is to elicit the idea that tally marks are organized in groups of five, like the 5-frame. This will be useful when students answer questions about data represented with tally marks in a later activity. While students may notice and wonder many things about these images, the fact that a group of five tally marks is shown with four straight lines and one diagonal line through them is the most important discussion point.

• Groups of 2
• Display the image. 
• “What do you notice? What do you wonder?”

• “Discuss your thinking with your partner.”
• 1 minute: partner discussion
• Share and record responses. 

• “Where do you see a group of five in each image?”
• “These lines are called tally marks. We know there are five tally marks when we see the diagonal line through the other lines. We are going to see data represented with tally marks.”

The purpose of this activity is for students to interpret a data representation and determine whether statements about the data are true or false. Students then explain why they think the statements are true or false. Although the class does not need to collect data for this activity, consider spending time during the launch discussing what animals the class would choose if asked "Which animal would make the best class pet?" This is an opportunity for the class to build community by learning more about one another.

• Groups of 2

• Read the task statement.
• “Decide whether each statement is true. If the statement is true, circle ‘thumbs up’.  If it is not true, circle ‘thumbs down’ Be ready to explain your thinking.”
• 4 minutes: independent work time
• 3 minutes: partner discussion

• Choose one statement Jada made that is false.
• “Is this statement true or false? Explain how you know."
• “How can we revise this statement to make it true?”

The purpose of this activity is for students to interpret data representations and write what they learn about the data. Students may learn different things about the data, but how many in each category and how many in all are most important.

Students might make statements like “8 students voted for turtles and dogs.” While this statement makes sense to students, it is not technically correct because it introduces the possibility that some students voted for both turtles and dogs. In upcoming lessons, students will answer questions such as “How many students voted for reading or science?”, so it is important to restate students’ statements in this lesson to use “or” instead of “and.”

• Groups of 3
• Read the task statement.
• 1 minute: quiet think time

• “Each student in your group will share what they learned about Tyler’s survey data.  After each group member has shared, write down three different statements about the data.”
• 5 minutes: small group work time
• Monitor for students who make statements about:
  • how many in all
  • how many in each category
  • how many in two categories combined

If students make statements about the data that are not true, consider asking:

• “Where on the representation did you look to help you make this statement?”
• “What statement could you make about the number of people who voted for turtles?”

• Invite previously identified students to share.

The purpose of this activity is for students to choose from activities that focus on adding and subtracting within 10. Students choose from any stage of previously introduced centers and are encouraged to choose the center that will be most helpful for them at this time. 

• What’s Behind My Back
• Check it Off
• Five in a Row: Addition and Subtraction
• Find the Pair

• Gather materials from previous centers:
  • What's Behind My Back, Stage 2
  • Check it Off, Stages 1 and 2
  • Five in a Row: Addition and Subtraction, Stages 1 and 2
  • Find the Pair, Stage 2

• Groups of 2
• “Now you are going to choose from centers we have already learned.”
• Display the center choices in the student book.
• “Think about what you would like to do.”
• 30 seconds: quiet think time

• Invite students to work at the center of their choice.
• 10 minutes: center work time

• “How has working on these center activities helped you build fluency with addition and subtraction?”