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- [3] Directed Observation and Supervised Teaching JOURNAL OF EDUCATIONAL RESEARCH, 1926, 14 (04): : 307 - 307
- [7] The Improvement of Teaching in Secondary Schools EDUCATIONAL RESEARCH BULLETIN, 1955, 34 (04): : 107 - 107
- [10] The Teaching of Mathematics in Secondary Schools JOURNAL OF EDUCATIONAL RESEARCH, 1930, 22 (05): : 418 - 420