Commonplace today, the zipper and button construction of blue jeans was a major innovation. Using the patent for the J.W. Davis and Levi Strauss innovation, individuals comb an image of the fly for clues. Afterward, they discuss its...

For this passive voice online worksheet, students identify if each of 5 sentences is in the active or passive voice. They rewrite 5 sentences in the active voice and 5 more in the passive voice. They write the correct passive forms in...

Audio-pictorial overview of the story of the California gold rush.