This study aims to determine (1) Student learning outcomes prior to the application of Number Head Together (NHT) in mathematics lessons with set material in Class VII A MTsN 3 Jambi City. (2) Student and teacher activities when Number Head Together (NHT) is applied in mathematics lessons with set material in Class VII-A MTsN 3 Jambi City. (3) Student learning outcomes after applying Number Head Together (NHT) in Mathematics with Association Material in Class VII A MTsN 3 Jambi City. This type of research is a classroom action research conducted at MTsN 3 Jambi City in Class VII-A. The findings of this study indicate: (1) in the first cycle, an average score of 75.2 was obtained and 17 students (56.67%) had completed learning while 13 students (43.33%) had not yet achieved mastery learning. The average score of student activity reached 2.55 which indicates a sufficient category while the average score of teacher activity reached 2.6 which is categorized as sufficient (2) in the second cycle the student learning outcomes were obtained with an average score of 83.5 with complete learning reached 86.67% or as many as 26 students while 4 students (13.33%) did not achieve the completeness value of learning. The average score of student activity reached 3.55 which indicates good category while the average score of teacher activity reached 3.5 which is categorized as good.

In this research, we are trying to find out whether problem solving is utilized in mathematics training to improve students' performance at MTsN 3 Jambi City Problem solving is done by focusing students' attention on a particular concern, encouraging them to analyze the problem, and getting them to learn about and discover solutions. Processing is the information means mixing mental processes and physical actions to arrive at a solution. the students' performance in mathematics proved' Significant correlation is shown by the findings of the seventh grade students" shows that 57.69% of the students scored below the Minimum Performance Criterion set, namely 76%." Students' ability to acquire different kinds of knowledge is deficient since the learning techniques utilized don't suit their learning needs. The state of students in this school when worksheet instruction is used without prior preparation is not only unacceptable, but unfair as well. Classroom analysis has been employed These studies were performed on MTsN 3 Jambi City College students During the period of April to June 2020, The experiment was carried out in two phases, phase I and phase II. This research concludes that problem-based learning solutions will benefit students' learning.