Make Math Moments Academy › Forums › Mini-Course Reflections › The Concept Holding Your Students Back › Lesson 1 – Which Has More? – Discussion › Reply To: Lesson 1 – Which Has More? – Discussion Robin Bergen Member April 5, 2021 at 10:39 am Robin Bergen Indirect comparison is when you use an object to tell the size. I use my thumb all the time because it is about an inch. Direct comparison is when you eyeball it.