Picture Glossaries
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A diagram with labels; picture glossaries help the reader to identify, differentiate, or define items within a group or parts of a whole. Have students make picture glossaries when it is important that they be able to define a subject by its parts, and/or by the relationship of its parts. Picture glossaries can help students see differences, varieties, and categories of subjects and can help them organize vocabulary in meaningful ways. For instance, having students label a picture glossary of an insect shows them that all insects have certain parts (like a thorax, or six legs) in certain places and that they can define insects by having the parts they have labeled on the diagram.
Scale Diagram
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A picture of a subject with a scale beside it, which indicates its size. Scale diagrams help students place subjects into context by comparing them to something familiar. They relate very large or very small objects to the students by rooting them in the students’ daily experiences. Scale diagrams also familiarize students with standard units of measurement and begin to place those units in context for them as well. In order to create a scale diagram, students must further translate this new knowledge to the development of a scale for the drawing. For instance, a student learns that a certain dinosaur is fifteen feet tall and thirty feet long, including its tail. She wants to see how big the dinosaur would be next to her, so measures herself. She is four feet tall. To translate the scale over to her drawing correctly, she makes one inch stand for a foot and draws herself beside the dinosaur. From the dinosaur towering over the small version of herself on the page, she can get a sense of just how big that dinosaur would be.