You're teaching the concept arthropod (insects, spiders, lobsters, crabs, shrimp, etc.) to your fifth graders. Using Piaget's work as a basis for your decision, which of the following would be the best example for teaching the concept?
a. A lobster from a fish store
b. A movie showing a crabber catching crabs in a crab pot
c. A color picture of a shrimp swimming in the water
d. A picture showing insects and their body parts
Question 2
A student is able to simplify mathematical expressions that include negative numbers. Which stage of development is best illustrated by the student's ability?
a. Sensorimotor
b. Preoperational
c. Concrete operational
d. Formal operational