The lectures constraint in learning comprises designing and implementing of learning and assessment. The students’ difficulties are caused by the abstract materials (23.26%), low of mathematics ability of students (34.88%), the students learning only for doing task/test (59.53%), low students’ prior-knowledge (46,51%), the students, habit to memorizing learning (51,16%), the students did not reflect their learning (53,48%), and the students easily forget the concepts learned (65,12).
Most of student difficulties were found in the topics: stoichiometry, chemical kinetics, and colligative properties (58.14%), but the smallest in the topics: material and its' change, and atomic structure (13.95%). All of the topics were considered difficult by a certain number of students. The result showed that the Basic Chemistry topics include: material and its' change, atomic structure, periodic system of elements, chemical bonding and molecular structure, stoichiometry, thermochemistry, chemical kinetics, chemical equilibrium, acid and base, hydrolysis, buffer, colligative properties, colloid, redox and electrochemistry, elemental chemistry, and organics chemistry. Data were collected by questionnaire and documentation. The object was Basic Chemistry topics, the materials that are difficult for the students and their cause, lectures constraint in learning, and lectures view about learning based on inquiry. The subjects were a syllabus, two lectures, and 43 students of the Third Semester in Academic Year 2018/2019 on Science Education Study Program, Ganesha University of Education.
The research aimed to need analysis of developing Basic Chemistry learning tools based on inquiry.
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