This lesson plan is for an 80-minute English class for 1st year secondary students focusing on using will/won't to make predictions. The plan includes 4 stages: a routine to welcome students and elicit predictions, a warm-up asking and answering about predictions, a presentation on conditional sentences, and 3 development activities for students to practice the target structure. The plan aims to integrate reading, speaking and listening skills and assesses understanding through interaction and oral production. Materials include worksheets, a projector, and markers. Students will work in pairs and groups to practice asking and answering about predictions.