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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

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ERIC Number: EJ187252
Record Type: CIJE
Publication Date: 1978
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
Teaching Depth of Field Concept
Ross, Frederick C.; Smith, Rodney J.
American Biology Teacher, 40, 1, 43-5, Jan 78
This activity utilizes an overhead projector, a wax pencil, and a petri-dish to demonstrate the depth of field concept to students learning the use of the microscope. Illustrations and directions are included. (MA)
Publication Type: N/A
Education Level: N/A
Audience: Practitioners
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A