There are a number of ways to paraphrase. The best technique is to “summarize”. Please follow these steps. Paraphrasing was never so easy-

•         Make a list of the main words.
•         Write them down.
•         Keep them as the base element.
•         Now, build your sentences around it.
•         The “main words” have been underlined in the text.

This is the best way to avoid plagiarism (in many cases self-plagiarism).

EXAMPLES

Let us have a look at an example of an excerpt from one of the literary pieces. It is

 American historical writing in the past century has produced two major theories or models of understanding, the economic interpretation of politics associated with Charles A. Beard, and the frontier interpretation of American development associated with Frederick Jackson Turner. Both views have had a pervasive influence upon American thinking, but Beard himself felt that Turner’s original essay on the frontier had “a more profound influence on thought about American history than any other essay or volume ever written on the subject.” …

[But] it became plain, as new thought and research was brought to bear upon the problem, that the frontier theory, as an analytic device, was a blunt instrument.

Now, what the students generally do is, replace the “theories or models “by “theories” or “models”, But , in any of these cases,  the student goes wrong.

Paraphrasing is not about changing some words or the voice of the sentence (active to passive and vice versa). It is about comprehending the words and reproduces them with the similar idea. The example of how a student would do it is

In the past century, American writing on history has produced two major theories, Charles A. Beard’s economic interpretation of American development, and the frontier interpretation of American development associated with Frederick Jackson Turner. Each view has exerted a pervasive influence on American thinking, but even Charles A. Beard had to admit that Turner’s essay on the frontier had “a more profound influence on thought about American history than any other essay or volume ever written on the subject.” Yet in time it became plain, as new research was brought to bear upon the problem, that the frontier theory, as a means of analyzing history, was not nearly precise enough. (Hofstadter, 1949)

If I had to do it, it would be as follows-

In his 1949 essay “The Thesis disputed,” Richard Hofstadter explains that there were two major currents of thought in historical writing about American development. He suggests that one of these, the “frontier thesis” associated with Frederick Jackson Turner, has been thought more influential than the other, the economic interpretation of politics associated with Charles A. Beard. He quotes Charles A. Beard admitting this fact to prove his point. Yet Hofstadter goes on to argue that Turner’s frontier theory, influential as it may have been, has been undermined by more recent research developments. (Hofstadter, 1949).

(Text source- plagiarism.org)

And there is no plagiarism detected in this paragraph.
Good Job ..  Right So please follow the same technique.