Science4Fun
Science4 Fun: Laws of Motion
This resource provides a discussion of Newton's Laws of Motion.
Physics Classroom
The Physics Classroom: Newton's Second Law of Motion
Learn more about finding acceleration through the practices found in this lesson. "The process of determining the acceleration of an object demands that the mass and the net force are known." Check out this comprehensive site.
Discovery Education
Discovery Education: Introduction to Physical Science
Introduce students to the ideas of motion and force in this hands-on lesson plan.