trails are not scaled. For example its just like doing a normal test like the mid years. When you get the paper back you will only get a scaled mark out of a 100%. However for the HSC when you do the paper the marking centre will keep the paper and you will only see the alligned mark on the sheet they mail you. However, you can request the raw mark out of 100% from the marking centre by purchasing it. In the HSC say for example chem you need approximately 72% raw mark (it fluctuates from year to year) to get 90 alligned mark. at School however you will only see the 72%, the teachers dont touch the mark you receive