I don't really know where to begin with this paragraph. My instructions are to type and revise the following paragraphs so that they’re easy to read as a presentation. Use simple sentence structure. Use correct placement of old and new information.

Human motivation is challenging to inspire and quantify. Psychologists, teachers and business leaders have developed innumerable theories to help define and encourage motivation. However, careful study of motivation eventually dictates learning about goal-setting.

Goal-setting is a reliable motivator. Having a goal usually leads to better performance than not having a goal, even if you don’t achieve your original goal.

An exception to the effectiveness of goal-setting is when the goal is not feasible. For example, if you’re a middle-aged person with no exercise history, setting yourself the goal of running a 10-kilometer race in a year is an achievable goal. In contrast, the goal of running a marathon in a year is less achievable—and may be dangerous. In the workplace, extremely high goals cause people to cease to cooperate with coworkers or cause overall job performance to suffer.

Commitment improves the likelihood that you will achieve your goals. Two factors influence your level of commitment. External pressure is embodied in an authority figure. A peer group can also be an authority figure. The authority figure encourages or threatens you if you don’t achieve. Internal pressure includes your expectation of success and rewards you give yourself along the way.

It sounds as if you need to paraphrase these paragraphs.

Read the following and try it out.
http://writing.colostate.edu/guides/researchsources/includingsources/paraphrasing/without.cfm

The paragraph doesn't make sense to me. Therefore, I'm having a really hard time "paraphrasing" it. Here's how I rearranged it. Please tell me if I'm doing it wrong. Thanks so much!

Human motivation is challenging to inspire and quantify. Psychologists, teachers and business leaders have developed innumerable theories to help define and encourage motivation. However, careful study of motivation eventually dictates learning about goal-setting.

An exception to the effectiveness of goal-setting is when the goal is not feasible. For example, if you’re a middle-aged person with no exercise history, setting yourself the goal of running a 10-kilometer race in a year is an achievable goal. In contrast, the goal of running a marathon in a year is less achievable—and may be dangerous. In the workplace, extremely high goals cause people to cease to cooperate with coworkers or cause overall job performance to suffer.

Commitment improves the likelihood that you will achieve your goals. Two factors influence your level of commitment. External pressure is embodied in an authority figure. A peer group can also be an authority figure. The authority figure encourages or threatens you if you don’t achieve. Internal pressure includes your expectation of success and rewards you give yourself along the way.

Goal-setting is a reliable motivator. Having a goal usually leads to better performance than not having a goal, even if you don’t achieve your original goal.

To make this paragraph easier to read for a presentation, you can break it down into smaller, simpler sentences and rearrange the information to flow more smoothly:

Motivating and quantifying human motivation can be challenging. Psychologists, teachers, and business leaders have developed numerous theories to define and encourage motivation. However, a careful study of motivation reveals that goal-setting plays a crucial role.

Goal-setting is a reliable motivator. When you have a goal, it generally leads to better performance compared to not having one, even if you don't achieve your original goal.

There is an exception to the effectiveness of goal-setting, and that is when the goal is not feasible. For instance, if you're a middle-aged person with no exercise history, setting the goal of running a marathon in a year is not achievable and may even be dangerous. In contrast, setting the goal of running a 10-kilometer race in a year is more attainable.

In the workplace, setting extremely high goals can hinder cooperation among coworkers and lead to a decline in overall job performance.

To increase the likelihood of achieving your goals, commitment is vital. Two factors influence your level of commitment. One is external pressure, which can come from an authority figure or a peer group acting as an authority figure. This external pressure can either encourage or threaten you if you don't achieve your goals. The second factor is internal pressure, which includes your own expectations of success and the rewards you give yourself along the way.