Eureka - AirSpeed Compact Bagless Upright (NEU10AE4, NEU100, etc.)

Am I correct in thinking the main goal is teaching folks how to use a typical vacuum? If that's the case, the eureka airspeed is probably the most "typical" type of vacuum people are going to see. It might be the better example of the ones listed, though it might spit debris around on hard floors. The little sticks are ok but not so good for carpet. Something like a eureka mighty mite canister would also be a good choice.

I agree with Flat\_Direction, I think your students would benefit the most from using the most common vacuums they will come in contact with. The cheap Eureka and Bissell stick vacuums are not what people commonly buy to clean carpets. The Eureka Airspeed is most like the average bagless vacuum. The most common vacuums are Bissell PowerForce Bagless and Shark Navigator vacuums. Sadly most box stores don't sell bagged vacuums and canister vacuums are rare so I wouldn't get them for your students. Bissell PowerForce Helix #3313 $59 (walmart) Shark Navigator NV380 $118 (walmart) With the Bissell PowerForce, Shark Navigator, and Eureka Airspeed your students can practice emptying the bin, checking the filters, and using a hose and tools. The little stick vacuums don't have a hose and tools and their bins/filters are not the common bagless upright design. Hope that helps.