Arab Educational Information Network

The main purpose of research represented in three sub- goals: revealing the number of latent classes which differentiates between Jordanian students ability depending on probability of their answers correctly for two content domain (numbers, algebra) in TIMSS test in mathematics, then to reveal demographics characteristic of students which is to revealing latent classes, then showing the latent reasons why Jordan is retracting globally in TIMSS test in mathematics. To achieve the research objective a test booklet which has the number 11 is chosen intentionally among other booklets in mathematics in 2011 in order to achieve the biggest number of items which contained (18) items in mathematics (9) items numbers content domain, (9) items algebra content domain since dimensionality starts from three items and correcting all items [Multiple choice, Casual Response] which suit patch key in data file to become binary score (0/1). The study sample which was subjected to statistical procedures consist of 531 students 8th grade Jordanian students. Mplus statistical program was used to answer the questions related to first sub goal research mean while SPSS statistical program was used for the second sub goal. The results related to math's showed Three latent classes for the numbers content domain, the latent reasons of the students' abilities differentiation on the form of latent classes numbers content domain are attributed to teachers’ gender, students' gender and the type of school. Where it is in the interest of the male and female students' who are taught by male and female teachers in the private schools (mixed, males, females) who admit not to observe the curriculum for their knowledge needs and those who follow the directorates of low and high performance. Two latent classes for algebra content domain, the latent reasons of the students' abilities differentiation on the form of latent classes in the algebra content domain are attributed to students' gender, the location of school, also to the teacher who presents the explanations to solve problems. They are in the interest of the female students', who study in the city schools and whom their teachers present the explanations to solve problems. (Published abstract)