In a lesson plan, warm up or previous knowledge test is an important step which needs a deep thinking on how to and where to start the lesson. Creative thinking may support a teacher well in planning this step. Some of the techniques such as briefly designed stories related to the topic, conduct a short activity relevant to the topic, short puzzles, brain storming, filing a format which have two columns showing already "know" and "want to know" about the topic being taught and third column shows "learned" which is filled at the end of the teaching by students, mind mapping etc. The mentioned activities looking at the relevancy can be incorporated for planning to skillfully start the lesson. It is to be noted that the warm up or previous knowledge test should engage students in the lesson and is appropriate for gaining students' attention. At the end of the activity, the teacher needs to tactfully link the responses of students in warm up or previous knowledge test to the actual subject matter of the teaching.