You have an English learner in your 5th grade science class, Luis. Luis moved to the United States 18 months ago. When you see him in the hallways or at school events, Luis seems very comfortable speaking English with his peers. He even chats with them before or after class. But during science lessons, he is virtually silent and rarely contributes to class activities unless you question him directly. Which of the following statements describes the most likely reason for this juxtaposition of interaction patterns?  

Which of the following should receive the most emphasis in a classroom management plan?

It is the beginning of the school day on a cool October morning. Students in your fifth-grade class arrive at the classroom, and, without being reminded, they unpack, put their book bags away, turn in their homework folders, sharpen their pencils, sit down, and begin doing the morning work that you have written on the board. Which of the following statements is most accurate in this instance?  

Which one of the following recommendations is most consistent with the suggestions for room arrangement given in the text?

The purpose of an air bag in an auto is to

A box is pushed eastward across a rough horizontal floor by a force acting parallel to the floor. A force providing an impulse directed westward on the body is

A gun is made of a super-low-weight but strong material. The bullet for the gun is more massive than the gun itself. For such a gun

A ping-pong ball is dropped vertically onto a stationary bowling ball resting on the floor. Which of the balls experiences the greater force as a result of the collision?

A body is suspended from a spring hanging vertically. The body is then pulled downward so the spring stretches. Consider the change in the elastic potential energy (EPE) of the spring and the change in gravitational potential energy (GPE) as the body is pulled down.

A physics professor places a soda pop can on the table and asks a student to identify the forces acting upon the can and the directions of each force. The two forces acting on the soda pop can are