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The purpose of this Warm-up is for students to make connections between bar graphs and picture graphs. While students may notice and wonder many things about these graphs, focus the Activity Synthesis on how the graphs represent the same data in different ways. This conversation leads directly into the next activity, in which students will read and interpret data represented in bar graphs.
The purpose of this activity is for students to write true statements to show what they can learn about the data in a bar graph. In the Activity Synthesis, students match their peers’ statements to the graph they think they came from and explain how they know using the features of the graph (MP2, MP3). In order to have a variety of different statements to share in the Activity Synthesis, look for ways to encourage students to write statements that combine multiple categories or compare categories. Share examples using the bar graph from the Warm-up as needed. For example, 8 total students liked fish or lizards as their favorite pet.
Groups of students in different classes were asked, “Where would you like to go on a field trip?” Their responses are shown in these bar graphs:
Write as many statements as you can about each bar graph.
The purpose of this activity is for students to interpret data represented in a bar graph and answer questions about the data. In previous work with picture graphs, students had to count the pictures in order to answer “how many” questions. During this activity, identify students who recognize that they can use the scale (numbers on the side) instead of counting each line or section of the bar. Ask these students to share during the Activity Synthesis. It is important for students to consider the benefits of using a bar graph compared to a picture graph.
This activity uses MLR6 Three Reads. Advances: reading, listening, representing.
MLR6 Three Reads
A group of students were asked, “What is your favorite season?” Their responses are shown in the bar graph.
Display the bar graphs from the Warm-up.
“Today we interpreted data represented in a bar graph. Using a bar graph is a little different than using a picture graph to answer questions.”
“How are the ways you used a bar graph to answer questions different from how you used picture graphs?” (The bar graphs have a scale that helps you see how many are in each group without having to count each one. You really had to read the bar graphs to make sure you were counting the right thing because there weren’t pictures that matched each group.)
“How are they the same?” (They both show a number in each group. You can count each picture in a picture graph and you can count each part of the bar in a bar graph.)