How do shadows form? What causes nearsightedness and farsightedness? How does a reflex camera work? Those who want to engage young students in active participation time and again can best explain physics through everyday phenomena. This folder provides you with ready-to-use worksheets filled with tasks from the fields of optics and acoustics, which hold significant importance in the curricula of secondary education. Topics such as frequencies (Which headphones have the best quality?) and the propagation of sound (How quickly does a thunderstorm pass?) are also addressed in a practical manner. The worksheets are designed for students to explore the content through self-discovery. All tasks are suitable for differentiation. Particularly practical: tips for planning and conducting lessons, as well as solutions, make your preparation easier.