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.
What is a Multiage Classroom? Multiage classrooms are composed of students who are more than one year apart. Students remain with the same teacher for more than one year. Multiage classrooms are made up of a mix of abilities and ages. Students are not grouped based solely on academic performance.