Descriptor
| Educational Research | 1 |
| Performance Factors | 1 |
| Pretesting | 1 |
| Pretests Posttests | 1 |
| Program Effectiveness | 1 |
| Programed Instruction | 1 |
| Teacher Attitudes | 1 |
Source
| Visual Education | 1 |
Author
| Hartley, J. | 1 |
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Hartley, J. – Visual Education, 1971
Descriptors: Educational Research, Performance Factors, Pretesting, Pretests Posttests
