Please choose the correct ending to complete the given sentence: Work World: [header] How to be an excellent teacher [title] Plan your lessons carefully. [step] Start with what you want them to learn, not what you want them to do. Lessons should always have a central learning objective, and any activities you plan should be focused on achieving this aim.

Ending1: So start with, " i want the children to learn that..." and then decide what they will do. [title] Plan for a variety of learning styles. Ending2: [title] Ensure that you have an appropriate class environment to practice in. [step] Don't encourage your students to concentrate in a classroom that isn't suitable for them, as it can cause health problems. Ending3: [substeps] If you want your students to get into trouble, don't leave them going aimlessly. Never promise students games that are meaningless to them, especially if a fail is preventable. Ending4: [substeps] Your goal might be to push the student to learn a new skill, or teach a few more. Think of lessons as a clickable way of seeing through into the present.

Answer format: ending1/ending2/ending3/ending4