Development of algebra test questions based on Bloom's taxonomy

In Indonesian mathematics textbooks, most of exercise questions for year 8 Algebra are at C1 and C4 levels of taxonomy bloom. Therefore, questions of C5 and C6 level are rarely found. This study aimed at developing Algebra test items for C5 and C6 level of the taxonomy. It employed Plomp's design research model. However, it is important to highlight that this paper only reports the validation phase of the study which was the analysis of the validity of C5 and C6 Algebra test items. Responses and feedback from four validators were analyzed descriptively and reported in this paper. The findings showed that the items test were valid and standardized at the cognitive level of C5 and C6. According to the feedbacks from validators, we revised the items. Finally, it can be concluded that the items satisfy the criteria of C5 and C6 with a validity score of 4,7. As the items satisfied the valid criteria, it is suggested that these questions can be used to further test their practicalities and effectiveness.