21st Century Science

The content area that I chose is how particles interact, mass and force.  I found a wealth of information at http://www.grc.nasa.gov/www/k-12/airplane/newton.html . This website is very useful for providing students with in depth research information that will be very helpful to their understanding of complex topics.  Another website that I used that will encourage student involvement, and promote inquiry processes is www.learner.org/interactives/parkphysics , this is an interactive site that allows students to "build" their own roller coaster and put it into motion. 
Providing students with opportunities to practice and use technology to enhance their learning will give them critical 21st century skills that they will need today and in the future.  Students will have a solid technological foundation that will help them succeed in the "outside" world. 
One of the activities that I would do in my classroom is use building materials to construct models of roller coasters, ramps and bridges.  Students will test different models to see how effective they are and which designs work best.  I would utilize the websites above by having students look for information online and then using that information to draw and construct their own models.
The largest challenges that I face is the limited amount of technology in the classroom, and the students' inexperience with them.  Computers are available in the school computer lab but require time and advance planning to reserve the them.  Not all of my students have experience using computers either.  However the more that they use computers and use interactive online activities the more knowledgeable they will become.