here's a mini booklet with 4 sheets to teach the imperfect tense to beginners -pre intermediate. It contains a text about the daily routine using the imperfect. Students need to identify the verbs and then make hypothesis about the use of the tense. It is then followed by some examples and explanation about the formation and uses, the imperfect for etre/avoir and 2 exercises.
I hope you will find this useful. Please check my store for more.