##### Dina Mazzacano

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#### Recent Reviews by Dina

Tue Mar 16, 2010 1:41 PM
Review
“Force and Motion: Newton’s Third Law” is a helpful “refresher” of Newton’s Third Law. I agree with the common misconception section that states that many students, especially at the third grade level, believe that if an object is at rest, no forces are acting on it. The comparison of the spring mattress to the atoms in an object (pushing back on you) will hopefully help clarify this misconception. Because these concepts are difficult to demonstrate, I feel that many of my students will be left with questions. Once again, the questions that were sprinkled throughout the tutorial were extremely helpful.

Tue Mar 16, 2010 11:26 AM
Good resource
I had more difficulty determining how to incorporate elements of this tutorial in my classroom, in comparison to “Newton’s First Law.” The concept of force equals mass times acceleration is a formula that many of my students will be able to apply, but I feel that the concept behind the formula may be difficult for some third graders to grasp. This tutorial was thorough in explaining net forces, and how an unbalanced force acting on an object will cause the object to accelerate. I enjoyed the spaceship simulation, and I feel that this demonstration will allow the students to understand that objects can accelerate faster with less mass. Once again, the quizzes were helpful in assessing my knowledge of the material, and I found the “Check Your Thinking” section a helpful review tool.

Tue Mar 16, 2010 10:24 AM