Asia-Pacific Forum on Science Learning and Teaching, Volume 8, Issue 2, Article 3 (Dec., 2007) Osman CARDAK, Kerim ONDER and Musa DIKMENLI Effect of the usage of laboratory method in primary school education for the achievement of the students' learning Previous Contents

Appendix

Example Exercise 1: Examining the epithelium of the tongue.

The Aim of The Exercise: To observe the structure of an animal cell.

Tools Used in The Exercise: Microscope, methylene blue, slide, thin glass cover, medicine dropper, water.

Security Precautions: You should be careful while taking a sample from the inner part of your cheeks by using a toothpick! Chemical materials should not been come into contact with your skin and clothes!

Application of The Exercise: A drop of water and a drop of methylene blue are put on a clean slide. The inner part of the cheek is skinned more than once by a toothpick. The pattern acquired by this process is spread on the liquid already existing on the stage. The thin glass cover is put on the slide and it shouldn’t meet with air. Postly the preparation is examined via microscope.

Questions About The Exercise:

1. How is the shape of the pattern that you examined via the microscope?
2. Which parts of the pattern did you observe?
3. What are the differences between the patterns received from a mouth and an onion?