We spend a lot of time practising our scales or arpeggios and preparing for exams. One of the things that can provide light relief from this is sight reading for pleasure. Yes, pleasure.
We can acquaint ourselves with so much beautiful music by changing our perspective on sight reading. Instead of it being another "to -do" item, let's see it as an encounter with something new, just as when we meet someone for the first time. Find repertoire that stimulates you and your learning and you will find pleasure in the insights that sight reading brings.
Effective sight-reading is a challenging task that requires different sets of strategies and skills from repertoire practice.
Ask your teacher to suggest pieces if you are short on material.