There is no standard manual of attitude assessment. The present study aimed at exploring the attitude aspects, teachers’ understanding, reasons for choosing instruments, obstacles in the implementation, and efforts to overcome difficulties in the attitude assessment. This is formative research and development. It shows that the aspects of attitude appropriate with Indonesian 2013 Curriculum involve honesty, responsibility, tolerance, discipline, cooperation, peace, and politeness; teachers’ perception of attitude assessment is Fairly Positive; teachers’ understanding of the attitude assessment is Fairly Good; the dominant instruments are observation and interview; the reasons for instruments choice are based on the appropriateness, practicality, and effectiveness; obstacles in the implementation of attitude assessment relate to the time span, broad coverage of attitude aspects, continuous assessment, lack of conceptual understanding, variability of format, difficulties in assessing certain attitude aspects; teachers efforts to overcome problems in the implementation of attitude assessment involve assigning group tasks, discussion with peer teachers, providing special guidance, intensifying interactions with the students and their parents, giving rewards and enhancing students motivation.