This lesson plan teaches English 9 students about modals, which are auxiliary verbs that express concepts like permission, obligation, and prohibition. It contains 4 learning objectives and will take place over 4 class periods. The lesson will begin with identifying modals in sample sentences and their functions. Students will then analyze a dialogue and identify the modals. The teacher will present and provide examples of modals of permission, obligation, and prohibition. Students will then practice identifying modals in sentences and writing their own sentences using modals. Formative assessments include exercises identifying modals and their meanings in sentences and writing an essay on the importance of learning modals.