Similarly, for the results of validity, validator of the material with an average 92%, and the results of the validity of the validator the material with an average of 85% Item Type: Based on the test results try the limited scale of the average of the test of the effectiveness of an increase in reserved pretest to the postest amounting to 19.3 (62.5 to 81.6), and on a wide scale trials of 14.8 (63.4 to 78.2). Based on a test of the feasibility of media experts, material, and students, the textbook was declared very worthy and effective use in learning. The results of this development in the form of textbook biology laboratory tools and materials that had already been through some testing and revision of the experts and students. Research in done in November 2017 in SMA Negeri 3 Malang. To find out the level of the validity test is done and the material while media experts to find out the effectiveness of student test done testing with pretest and posttest problem on a limited scale and trials. Modification research model teridi top three steps namely study introduction, model development, and validation of models. This type of research is research development with a research and development model (R&D), steps in the development of the research done using model Borg and Gall (1983) modified by Sukmadinata (2009). This research aims to produce textbook biology laboratory tools and materials and analyze the effectiveness and validity to improve mastery of the material concept of students in relation to the materials safety grade X SMA/MA. Textbook is a form of learning materials to suit the present curriculum is expected to address the issue, and are able to improve your mastery of the concepts students. In addition, the lack of learning materials that are used in the student's learning is the other problem. Material safety less emphasis on the principal problems of laboratory tools and materials into other problems. So learning about early lab introduction in a laboratory so less to get it.
The number of teachers, is still rarely carry out learning in the laboratory by utilizing the tool or the material of the laboratory as a means to achieve the goal.
The issue of learning in Biology lab, rarely so noted by educators today.
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