Learning Toolkit Development Case Method and Team Based Project in Numbers and Algebra Courses Codural-Based Elvi Mailani 1* , Daitin Tarigan 2 , Andri Kristanto Sitanggang 3 {elvimailani@gmail.com} 1,2,3 Primary School Teacher Education, Faculty of Education, Universitas Negeri Medan, Indonesia Abstract. This research is a development research that produces online learning device products using the Case Method and Codular-based Team-based project in the Number and Algebra Course at PGSD Unimed. Learning Tools consist of: Semester Learning Plans (RPS), Lecture Event Units (SAP), Student Worksheets (MFIs), Assessment Instruments and Teaching Materials. online using Case Method and Codular-based Team based projects in Numbers and Algebra Courses. This development is carried out using a 4D model that emphasizes the needs of lecturers and students. At the initial stage, a needs analysis, concept analysis, and student analysis are carried out. Based on this analysis, an Online Learning Tool was designed using a Codular-based Case Method and Team-based project in the Numbers and Algebra Course at PGSD FIP UNIMED. This research resulted in an Online Learning Tool using a Codular-based Case Method and Team-based project in the Numbers and Algebra Course that is valid, practical, and effective. Keywords: Case method, team based project, Kodular 1. Introduction The lecture process carried out by a lecturer is a means of transforming knowledge and various skills that must be possessed by students after they complete their education at the tertiary level. In delivering the course that is effective, a lecturer should develop various innovations in order to produce quality, resilient and ready to face future challenges. Especially at this time where our nation and almost all parts of the world are being hit by an outbreak that is not necessarily certain when it will end. Every lecture conducted by a lecturer should present a real situation or a real problem that will later be faced by the student in his life, both in the world of work and in his life as a society. From these problems, it is hoped that students will be able to solve them both individually and as a team in community groups. This is certainly very important to do so that students have experience in solving various problems after they later finish their education in college. ICIESC 2022, October 11, Medan, Indonesia Copyright © 2022 EAI DOI 10.4108/eai.11-10-2022.2325393