مخطط البناء الضوئي على سبورة بيضاء

A detailed, hand-drawn whiteboard diagram illustrating [the process of photosynthesis], designed for [a high school biology class]. Sketched with dry-erase colored markers on a clean white board, featuring simple icons of [a sun, a green plant, water droplets, and CO2 and O2 molecules]. Includes neat handwritten annotations and clear directional arrows indicating the flow of energy and matter. Clean, legible instructional layout mimicking an authentic classroom whiteboard drawing.