Development of learning tools "Tuban Mangrove center ecosystem" with a guided inquiry model on "analyzing the interaction of living things" activity

The research objective is to develop a learning tool with a guided inquiry model on the activity of "analyzing the interaction of living things based on the Tuban Mangrove Center ecosystem" which is feasible to use. Based on observations, many teachers who in developing learning tools in schools have not been able to take advantage of the local potential that exists in the surrounding environment accompanied by guided inquiry models for "analyzing" activities in their learning. This research produces learning tools including syllabus, lesson plans, student worksheets, handouts, and assessment instruments. The research and development method used is Research and Development adapted from Borg & Gall (1983) up to the seventh stage, the "practical test revision" stage. The development steps carried out are (1) research and data collection, (2) planning, (3) product draft development, (4) product validation, (5) product revision, (6) practicality test, (7) practicality test revision. The research data was obtained from descriptive analysis on the validity of learning tools by validators and practicality of learning tools by users (teachers and students) in the form of quantitative (questionnaire) and qualitative data (suggestions). The level of validity of learning tools is in the very feasible category with a value of 90.5%, the level of practicality of learning tools by teachers is 97.3% and the level of practicality of learning tools by students is 97.5%, both of which are in the very feasible category. This shows that the learning tool meets the criteria very feasible to be implemented in the learning process. The results of the effectiveness test with the pretest-posttest design showed a significant difference after students learned to use the developed product with an N-Gain value of 52.4% so that the product could be categorized as quite effective.