So you have answered all your homework, handed it in and are anticipating getting it back with full marks. However, when you get back your grade it is lower than expected.
This may be because you only wrote the answer down and did not show your working or did not justify your answer. You have the right answer written down but not the perfect answer. Why is this? Teachers want to know how you got to this answer or why you think it is a particular answer.
To do this you should show all your working or reasoning, here are a few examples.
Note each calculation is on a separate line and the equal signs are aligned.
Your teacher can see what you have done and why you have done it, and how you arrived at that answer.
What is the structure of the atom?
Atoms are made of protons, neutrons and electrons. Protons, which are positively charged, and neutrons are found in the nucleus (center of the atom). Electrons are negatively charge and are found in shells outside the nucleus.
This answer starts with the minimal amount of detail needed to answer this question. Additional details show the teacher that you fully understand the subject.
An important benefit of showing all of your work is that you have a good set of notes and examples that can help with revision as well as increase your mark in your home work and test.