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Structure and Function > Seeds |
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Seeds
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| Order and Timing of Events |
| Overall Objective |
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To examine changes during germination, in terms of the order of events or their timing. For example, do roots grow before shoots?
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| Lessons |
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Students observe and re Close observation of seeds in plastic bags, water agar, and other "visible media" such as the root view, allows students to see the emergence of seed structures. After becoming familiar with this process, students can collect data on several aspects of this process. For example, seed structures can be measured on a daily or semi-weekly basis. In addition, students can note the timing and duration of seed structures during the seed germination process. These data can be collected and represented to highlight the variation in timing within and across types of seeds. cord changes in different kinds of seeds and seedlings, illustrate their understanding of change by drawing sequences, and propose, plan and conduct investigations.
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Seed bags : Students compare changes in four types of seeds and seedlings.
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Seed sequence drawings : Students illustrate seed changes and seedling development.
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Seed images : Students note changes during germination of different seeds.
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| Seed sequence drawings |
| Objectives |
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To allow students to bring together their understandings of change over time and structure by illustrating sequences. To assess student learning related to seed germination. |
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| Overview of Lesson |
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Students were given strips of paper, and then were asked to illustrate seed changes and seedling development after planting. Some students included labels and text in their drawings.
This task allowed us to assess student knowledge of change over time in the context of seed germination and growth. Also, we could assess student knowledge of seed structures and their order of emergence. The drawings showed a wide range of student understanding. Ideas about growth conditions, parts of the seed, and life cycle were evident in individual student drawings.
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| Children's Thinking Druing Lesson |
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Click the buttons to see examples of students' thinking
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| Go to the related big ideas |
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Last Updated:
February 17, 2005
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