Read the short eduKateSG answer when your question is narrow and the direct answer is enough. These compact pages are designed to remove unnecessary reading: they state the answer quickly, establish the important boundary, and route you onward only when more depth is useful.
Read the full article when you need to understand why the answer is true, how the reasoning works, what evidence supports it, where the model can fail, how the idea changes across levels, or how it connects to other parts of the site. Long articles carry context that should not be compressed away when the context is part of the answer.
A simple rule is: short page for orientation; hub for choice; full article for understanding. Start with How Do I Find the Right Page on eduKateSG? when you are unsure which depth you need.