What we already learned in previous chapters. What we are going to learn in this chapter ?

What we already learned in previous class

What we already learned in previous classes

What we already learned in previous classes

What we already learned in class IX

What we learned in previous classes.

What we will learn in this Chapter

What we will learn

What we learn from ants?

Generally a teacher summarizes and repeat the main points of the previous learnt chapter while starting a new chapter identify the importance of doing so in learning

What is operation where we used it in previous classes