Proceedings of the Central Association of Science and Mathematics Teachers
Central Association of Science and Mathematics Teachers (U.S.) ... The changes and properties of the substances are usually very confused, but I do not think we can expect anything else. ... The fourth grade pupils, as stated before, act as assistants to the eighth grade, and are initiated into laboratory methods and terms.
| Title | : | Proceedings of the Central Association of Science and Mathematics Teachers |
| Author | : | Central Association of Science and Mathematics Teachers (U.S.) |
| Publisher | : | - 1913 |
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