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This is how you use a light microscope:

1. Plug it in.

2. Turn on the light.

3. Prepare your sample.

3a. Get a slide and coversheet.

3b. Place a drop of water on the slide.

3c. Place your TINY sample of organism on slide. For instance, you could do cheek cells by rubbing some off the inside of your cheek with a toothpick and mixing it into the drop of water.

3d. Put your slide under the microscope and secure it in place with the clips.

4. Put the microscope on the farthest away setting. That will be the smallest number. So if your choices are 10x, 40x and 100x, 10x is the farthest away. That means it is the least magnified, or only 10 times as large as it is in real life. Make sure the arrow point is touching the middle of the sample.

5. Focus the microscope by turning the big knob for large adjustment or the small knobs for smaller adjustment. When you have a clear picture, go to the next largest magnification and focus again.

6. Then do the last magnification. Now you should have a clear picture.

GOOD LUCK. Any questions?