HOTS must be owned by students, and need to be assessed authentically. This study aims to 1) analyze the efforts of high school teachers in Malang in developing a HOTS-authentic assessment in tissue structure materials; and 2) Analyzing the pre-validation final draft of the HOTS-authentic assessment model on tissue structure materials. The research method used is R&D. However, in line with the objectives, this publication only focuses on define, design, and develop. The develop part is only on the product (a pre-validation final draft). The research was carried out in state high schools in Malang (SSHS 1, 3, 4, 7, and 8). The study was conducted in April-November 2018. The subjects were 2 teachers from each school (there was 10 teachers). Research data and findings were analyzed by descriptive analytic qualitative. The results show that teachers have included or considered HOTS aspects in lesson plans. However, the development of HOTS aspects and their assessment were not able to be carried out maximally. In practice, in a greater percentage, teachers use lesson plans without modification or making adjustments to student conditions. They modify and incorporate the HOTS aspect if there is an opportunity to discuss with other parties who guide them. Therefore, the existence of this model is very needed. The pre-validation final draft is essentially in the form of concepts that can be linked to the MGMP activities, and various related parties, in an interactive and cyclical relationship so as to form a model of professional development of biology teachers.

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