¿Cuántos Agujeros Tiene Un Anillo?

Tells the story, through graphic novel format, of Harriet Tubman and her life as a leader on the Underground Railroad.

The first Thanksgiving was a celebration. The pilgrims were thankful for the harvest they planted. Find out what the pilgrims ate for the first Thanksgiving. Paired to the fiction title A Year of Fun.

Presents a typical day of a bulldozer driver, with the safety equipment he puts on, the levers, beeper, and blades he uses in its operation, and what he does to get the bulldozer ready for the next day.

Interesting facts and experiments explore the dynamics of a race car engine to teach about air flow and drag, safety equipment and roll cages, the fuel system and horsepower, suspension and track bars, internal combustion, why race cars don't have speedometers, how roof flaps are designed like airplane wings, and more.