This lesson plan template is created with the strategy backward design in mind. The idea is that if we plan with the end in mind we will more effectively plan.
So start with the end outcomes you want for your students. Identify what you want them to be able to do. Finding actual examples of problems or choosing an assessment is most effective here because it makes it very clear exactly what students should be able to "do" and "know" by the end of your instruction.
Identify the skills needed to successfully complete the chosen assessment. Then plan to thoroughly teach each skill.What will students do to practice these skills?
How will you teach students to learn the identified skills? What will you do to help bring understanding?
How will you introduce the topic(s) to be addressed? Is there a creative way to initiate the class conversation on the topics ahead?
The main idea here is start with the end in mind (and I would say in hand :-)