Introduction

Begin with a sentence that will catch the reader's interest. This might be a question, a reason people find the topic interesting or important, or something the two subjects have in common.
Then name the two subjects and say they are very similar, very different or have many important (or interesting) similarities and differences.

Paragraphs 2 - ?

The next paragraph(s) describe features of the first subject. Be sure to include examples proving the similarities and/or differences exist. Do not mention the second subject.

Make new paragraphs to avoid very long paragraphs.

Paragraphs ? - ?

The next section must begin with a transition showing you are comparing the second subject to the first.

For each comparison, use compare/contrast cue words such as like, similar to, also, unlike, on the other hand.

Be sure to include examples proving the similarities and/or differences exist.

Make new paragraphs to avoid very long paragraphs.

Conclusion

In the final paragraph, give a brief, general summary of the most important similarities and differences. End with a personal statement, a prediction, or another snappy clincher.

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Introduction

Begin with a sentence that will catch the reader's interest. This might be a reason people find the topic interesting or important, or it might be statement about something the two subjects have in common. Review opening sentences in your English text for additional ideas.

Then name the two subjects and say that they are very similar, very different or have many important (or interesting) similarities and differences.

Paragraph 2

Transitions beginning each paragraph are made by repeating ideas, phrases or words. Without transitions, the essay will sound choppy and disjointed.

Discuss how both subjects compare on feature one.

For each comparison, use compare/contrast cue words such as like, similar to, also, unlike, on the other hand.

Be sure to include examples proving the similarities and/or differences exist.

Paragraphs 3 - ?

Transitions beginning each paragraph are made by repeating ideas, phrases or words. Without transitions, the essay will sound choppy and disjointed.

Continue the pattern set in paragraph 2 discussing a new feature in each new paragraph.

For each comparison, use compare/contrast cue words such as like, similar to, also, unlike, on the other hand.

Be sure to include examples proving the similarities and/or differences exist.

Conclusion

In this paragraph, give a brief, general summary of the most important similarities and differences.

End with a personal statement, a prediction or another snappy clincher.

http://712educators.about.com