Bone marrow. The inside of your bones are filled with a soft tissue called marrow. There are two types of bone marrow: red and yellow. Red bone marrow is where all new red blood cells, white blood cells, and platelets are made.
Mine is 8m x 7m (3m is 10 feet, so around 27 x 23 feet). This is normal for an Australian classroom, although there's a fair bit of variation.
CLASS SIZE EXAMPLE Reducing from 25-30 students to 15-20 is about 0.22! Teaching speciï¬c programmes to assist students in test taking is about 0.27! Hattie argues that the effect sizes are similar but one is much less difï¬cult to resource (the latter in case youâre wondering)