Improving the existing means of classroom attendance checking of students in school, this study aims to develop an automatic and computer-based attendance checker system using Radio Frequency Identification (RFID) Technology. Using arduino nano, RFID readers, tags, and programming languages for a virtual portal, the Automatic Attendance Checker System was created. The results and findings indicate that the automatic attendance checker system needs a database to store the students’ data, such as student ID number, name, grade, section, sex, and the date and time they logged in or out of the system. The average time for processing timing in was 0.53s while for timing out was 0.34s. Comparing it to manual attendance checking, the average time took only 22.29s while manual attendance checking took 88.3s. It also shows that the product is efficient in detecting whether a student is late, on time or absent. In conclusion, it is feasible to create an automatic attendance checker system with the use of Radio Frequency Identification (RFID) technology that is more efficient and accurate. Therefore, it is recommended to use and employ this product for tracking the attendance of students.