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| Elementary School Science | 1 |
| Instructional Materials | 1 |
| Measurement | 1 |
| Reading Level | 1 |
| Textbooks | 1 |
| Vocabulary | 1 |
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| J Res Sci Teaching | 1 |
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O'Toole, Raymond J.; Bedford, John P. – J Res Sci Teaching, 1969
Descriptors: Elementary School Science, Instructional Materials, Measurement, Reading Level
