These worksheets were originally created for students in an upper autism class to teach basic characteristics of visible light and how it behaves. Key concepts included opaque, transparent, and translucent. The first worksheet is an observation form. Students are presented with six pictures (a ziplock bag, drink lid, cardboard box, wax paper, table, and glass cup). Students are asked to determine how much light can be seen through each item. Students select the bright yellow box for lots of light, faded yellow box for some light, and black box for no light. The second worksheet asks students to cut out the above pictures and paste them into the correct category (opaque, transparent, and translucent).