Assessing the Effectiveness of a Novel Microscopy Technique in Middle & High School Science Classrooms

被引:1
|
作者
Raven, Sara [1 ]
Cevik, Emel [2 ]
Model, Michael [3 ]
机构
[1] Texas A&M Univ, Dept Teaching Learning & Culture, Sci Educ, College Stn, TX 77843 USA
[2] Texas A&M Univ, Dept Teaching Learning & Culture, College Stn, TX 77843 USA
[3] Kent State Univ, Dept Biol Sci, Kent, OH 44240 USA
来源
AMERICAN BIOLOGY TEACHER | 2020年 / 82卷 / 07期
关键词
transmission-through-dye; TTD microscopy; inquiry;
D O I
10.1525/abt.2020.82.7.463
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Although research and new technologies have introduced different ways of observing microorganisms, including scanning and electron microscopy, these methods are expensive and require equipment that is typically not found in a middle school classroom. The transmission-through-dye technique (TTD; Gregg et al., 2010), a new optical microscopy method that can be used with current basic light microscopes, relies on the fairly simple mechanism of filtered light passing through a dyed medium to produce an image that reflects cell thickness. With this technique, living microorganisms look bright red against a dark background, and movement can be seen easily among dead microorganisms and debris that show up black. Since the technique is low-cost and easy to implement, it addresses the needs of practitioners and is appropriate for a wide array of school contexts. We describe a three-week, hands-on, inquiry-based unit on TTD microscopy for middle and high school students.
引用
收藏
页码:463 / 469
页数:7
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