The intent of this article is to define quantitative research and explain why I choose this as my research approach. As for Marczyk, DeMatteo and Festinger (2005) suggest, it is necessary to think carefully about an appropriate research design when the researcher wants to answer specific questions, clearly define the variables, and measure the hypothesis. Choosing the right research design is important because each type of research design has its own characteristics and methodology. That said, you need to realize that all research projects have both strengths and weaknesses. Therefore, the researcher must make an informed and personal decision about the fit between the types of variables to be studied and the strengths and weaknesses of various methods (Herzog, 1996). Research design can be classified into two main categories; quantitative research and qualitative research. These two types of searches are different. Quantitative research deals with the use of numbers and closed-ended questions in quantitative hypotheses. On the other hand, qualitative research focuses on the use of open-ended words and questions in qualitative interviews (Creswell, 2009). As Greener (2011) explains "Quantitative research is primarily about techniques that analyze numbers. Quantitative data are the numbers we use as data or the results of numerical processes that the research was designed to do (pp. 2-3). Greener ( 2011) ibid further describes quantitative methods as “Social research methods that rely on numbers in one form or another. Quantitative methods are typically deductive and are extremely powerful in hypothesis testing because of their strong internal validity" (p. 202). John W. Cr...... half of the paper ...... and a discovery For example, if we want to know whether pupils' self-esteem and their social background have any influence on their achievement, we could review the theory and formulate the hypothesis that low self-esteem is influenced by lower social class and demonstrate this suspicion using the quantitative research (Muijs, 2004). conclusion, it is often difficult to choose between quantitative and qualitative research because there seems to be an overlap between qualitative and quantitative when we carefully observe the real beliefs of researchers (Muijs, 2004). both quantitative and qualitative research are appropriate in particular situations and inappropriate in certain situations. We should not select a research design just because we are more familiar with one method or the other recommends a particular design.