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.
Set a good example to your students by providing a neat and organized classroom. 3. Make your classroom look attractive. Use plants, bulletin boards, banners, warm colors, or anything to help make your classroom look aesthetically pleasing. 4. Structure your classroom as to avoid chaos and promote learning.