Improving HOTS in Biology Learning: A Supplement Book of Plant Growth and Development

Biology learning in the 21st century requires Higher Order Thinking Skills (HOTS) especially on the topics of Plant Growth, Development, and Environment. The purpose of this study was to improve students HOTS in learning Biology using the Supplement Book of Plant Growth and Development (SB-Plant). The research method used in this study was an experiment with a sample of 56 students. The instruments used were 8 items about HOTS, which have been declared valid and reliable. The results showed that the average HOTS score of students increased significantly by using SB-Plant. The highest gain score in the third indicator (create) with an increase in gain score of 0.46 (moderate). Meanwhile the smallest increase occurred in the first indicator (analyze) with a score of 0.20 (low). The conclusion was that SB-Plant is effectively used to increase HOTS in Biology learning.