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.
Questions for teachers. 1  What is your average class size? 2  What is the average ratio of female to male students in your classes? 3  What is the average age of your students? 4  What is the average reading level of your students? 5  What languages do you use in your classroom? 6  Do you have students with special needs? 7  On average, how much time do you spend ...