A Method of Self-Instruction for Learning the Easier Addition and Subtraction Combinations in Grade I
| Autor: | Wilburn, D. Banks |
|---|---|
| Zdroj: | The Elementary School Journal, 1942 Jan 01. 42(5), 371-380. |
| Databáze: | JSTOR Journals |
| Externí odkaz: |
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| Autor: | Wilburn, D. Banks |
|---|---|
| Zdroj: | The Elementary School Journal, 1942 Jan 01. 42(5), 371-380. |
| Databáze: | JSTOR Journals |
| Externí odkaz: |
|