The aim of this research is to develop Unit Kegiatan Belajar Mandiri (UKBM) based on Higher-Order Thingking Skills (HOTS) on static fluid basic material that valid. There are 4 static fluid Unit Kegiatan Belajar Mandiri that developed, namely, 1st UKBM is Hydrostatic Pressure, 2nd UKBM is Pascal's Law, 3rd UKBM is Archimedes Law and 4th UKBM is Surface Tension. This type of research is Research…