I’m a big fan of NLVM. I actually want to share two that I’ve been extremely happy with the results that have produced in the classroom. The first is the algebra balance scale. I have used this to introduce the whole idea of balancing and solving one and two step equations. What is nice is that you can “create” or enter your own problems. I also use the newest version of IE so that I can have different problems set up and ready to go in each tab. Then I simply set it up to my digital projector and instruct the class using the manipulative. I have also let the students get out their laptops and practice solving equations. It is nice that they are able to see how they are affecting the equation. The other I would like to share is the geoboard. I have used this to discus both similar and congruent figures. One neat feature is the ability to color the shapes. This could also be used to discus properties of polygons, area, perimeter, ect. The best part is those “perfect” junior highers won’t be able to make fun of your artistic ability on the board when you are creating regular polygon.
You are right those “perfect” middle school students like to comment on my artistic ability as well !! I am going to have to look into those to tools. I have never used either and both sound like they can be easily adapated to a variety of levels. Thanks !!