The lesson allows young scientists to use lasers and mirrors to study reflected light. A reading passage and homework question assess learning, while additional material introduces extension activities. 

Don't shine like a diamond, refract light like a diamond. Young scientists use an acrylic block and a laser light to observe refraction. Advanced scholars figure the sine of the angles of reflection and incidence as well as mastering...

In this proofreading worksheet, learners mark infinitives, prepositional phrases, subjects and verbs in a paragraph titled "The Twentieth Century,"then edit for missing commas.