This lesson is pretty straight forward if you use the power point. I introduce the topic with a definition and some basic examples. I talk about accepting and not accepting someone's suggestion, then have a matching and fill in the blank work sheet to work on student's comprehension. After, I have a group/pair activity where students look at different pictures/problems where they must offer a helpful suggestion (write a suggestion). Before the students start creating suggestions for each problem, I refer to the black board where I have written a list of all different examples of suggestions (ex. Shall we, Why don't we, Would you, If I were you, If I were in your shoes, How about, Should, Ought etc). These examples help the students come up with creative suggestions for each problem. Afterward, I show slides with some examples of suggestions they could have made, or some additional suggestions to what they have made. If you have time, you can have the students present their suggestions.
I found this lesson to not be super easy for my high school students. The lower levels seems to do alright with additional explanation from my co-teacher, and my advanced students seemed to be challenged just enough.
The worksheet and information I used to make this power point came from ESL Printables.