Evolution is one of biology topics which covers a wide range of material taught across education levels. Unfortunately, the material has not been arranged according to its complexity level and students’ development. This study aimed to collect teachers' opinions about the learning continuum of evolution material based on its complexity level. This descriptive research was conducted in Bantul and Yogyakarta Cities by distributing questionnaires. As many as 68 junior high school (JHS) teachers and 43 senior high schools (SHS) teachers were selected through convenience sampling. The data gained was analyzed using descriptive statistics to determine the mode of practitioner opinion. The results showed that the JHS teachers thought that evolutionary material had a complexity level of 3 (quite complex) to level 5 (very complicated) that could be taught in class VII & IX as well as at higher level (XII SHS). Furthermore, the SHS teachers argued that the evolution material from level 3 (quite complex) to level 4 (complex) could be taught in XII class. Further research needs to be carried out using more complete instruments with more detailed indicators.

This research is a descriptive research using the survey method. This research aims to collect elementary school teacher's opinion about the learning continuum of ecological aspects based on the level of complexity. The research data is conducted by means of a questionnaire. The research use the hypothetical population and convenience sampling. Respondents in this research consist of 156 teachersI elementary school teachers from Yogyakarta and Bantul regency. The results data are processed with statistical descriptive technique to find the data modus. Based on the results assessment of the complexity level of ecological aspect according to elementary school teacher's opinion, the learning continuum of ecological aspects can be taught at V and VI of elementary school grade, for elementary school grade ecology material with complexity level 2 (simple) and level 3 (rather complex) can be given, while for the secondary school grade, it can be taught taught at VII and VIII of junior high school grade, and for this grade ecology material can be given with complexity level 3 (rather complex) and level 4 (complex).