Textbooks have a strong influence on curriculum development, learning approaches, activities and even assessments of learning mathematics. The aim of the research is to describe the use of mathematics textbooks based on the Singapore curriculum in mathematics learning. This research is a qualitative research with a case study method. The participant is an elementary school teacher at a school in Tangerang. Data collection was carried out by observation using an observation guide. Data analysis was carried out descriptively using coding. Coding uses Nicol and Crespo's framework regarding the model of using textbooks in mathematics learning, namely adhering, elaboration, and creating and is seen based on the role played by the teacher in the learning process. The results of the study show that the level of teacher use of books is in the adhering category for each teacher's role in using textbooks.

The purposes of this research are to investigate the needs and expectations from primary teachers of having a digital student agenda and develop a suggested model to be used during home-based learning. Open-ended questionnaire was distributed to primary teachers in a private Christian school located in Tangerang and an interview was done with the head of academic coordinator as well as with the primary curriculum coordinator to collect data. At the same time, a digital student agenda model was constructed, considering its possibilities to cover affective and spiritual aspects that allow more holistic development in the primary students lives assisted by their parents. A research and development research method was used to produce a suggested model of a digital student agenda. The results show that both primary teachers and the academic coordinator agree to have a digital student agenda that promotes more communication between teachers and parents. It is recommended this preliminary research is followed by a micro and macro-scale testing to ensure its reliability and further expanded use.