Chemistry instruction for Secondary 2 students using mixtures aims to introduce students to the basic concepts of substances and their properties. In this process, students are encouraged to understand the difference between a single substance and a mixture, as well as to identify types of mixtures, such as homogeneous and heterogeneous mixtures. The material should be delivered through a contextual approach so that students can easily connect the concepts learned to everyday life, such as mixtures of air, sugar water or soil. In this way, students realize that chemical concepts are closely related to the things they encounter in their surroundings.
Through observation and discussion activities, students become more active and motivated to learn because they are directly involved in discovering the meaning of the concepts being studied. Furthermore, group work in learning activities can also develop communication skills, collaboration and a sense of responsibility among students.
In the evaluation phase, assessments not only focus on students’ cognitive abilities through written tests but also encompass scientific attitudes and process skills demonstrated during learning activities. Aspects assessed include students’ ability to observe, ask questions, conduct experiments, and draw conclusions from observations. Through an active, creative and enjoyable learning approach, students are expected to develop a deep understanding of the concept of mixtures and foster curiosity about various scientific phenomena around them.
