"Differentiation means tailoring instruction to meet individual needs."
An ideal concept that every teacher would support. In practice, it can be challenging due to factors like large class sizes, time constraints, classroom management, lesson preparations, and so on.
However, with small adjustments, you can apply differentiation in your lessons. Students become calmer and perform better when their needs are met. And this doesn't necessarily require extra time; in fact, in the long run, it saves a lot of time and energy.