I have been in the teaching profession for several years. Three Curriculums has been implemented since I started teaching “ Biology”. So many strategies have been applied for better understanding of the lesson. For so many students, they find biology as boring, difficult and complicated because of so many technical and scientific terms but I have never lose hope, I believe with the proper approach and strategy, appropriate topics and in the right time student would still love and learn the subject.
Now that we are becoming high tech ,modern technology and equipments has been used in so many private schools and in some public schools, and I am proud to say that our is “one”, when it comes to technology. With the used of this modern equipment like microscope, I was able to introduce to my students the structure of a minute specimen the “cell “
A microscope (Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. The science of investigating small objects using such an instrument is called microscopy, and the term microscopic means minute or very small, not easily visible with the unaided eye. In other words, requiring a microscope to examine.
Compound optical microscopes can magnify an image up to 1000X and are used to study thin specimens as they have a very limited depth of field. Typically they are used to examine a smear, a squash preparation, or a thinly sectioned slice of some material. With a few exceptions, they utilize light passing through the sample from below and special techniques are usually necessary to increase the contrast in the image to useful levels (see Contrast methods). Typically, on a standard compound optical microscope, there are three objective lenses: a scanning lens (4x), low power lens (10x), and high power lens (40x). Advanced microscopes often have a fourth objective lens, called an oil immersion lens. To use this lens, a drop of oil is placed on top of the cover slip, and the lens moved into place where it is immersed in the oil. An oil immersion lens usually has a power of 100x. The actual power of magnification is the product of the powers of the ocular (usually 10x) and the objective lenses being used.
I have seen in their face how interesting and enthusiast my students are. Upon seeing the structure under the microscope I was hoping that my students are enlightened about the cell. But I have noticed confusions were still there. With the used of another device “ body viewer” with an enlarged model of the cell, I believed that I have cleared and erased the confusions in them.
I never thought that the cell which all biologist believed to the basic unit of life can bring back the “ life “ into my science class and I got to make my students more active and eager to learn BIOLOGY.
