Learning Resources Bullseye Demonstration Compass, Dual-Scale Ruler, Classroom Whiteboard Accessories, Teacher Aids, Grades 1+

I purchased this to be able to make circles on a whiteboard. I got so I could specifically draw out the orbits of the planets in our solar system. I was able to do this quickly and easily and maintain a relative distance between all of the orbits. My only complaint regarding this item would be that the suction cup adheres to the whiteboard too well! When trying to remove it from the whiteboard I almost pulled the board off of the wall. (The whiteboard, while attached to the wall, wasn’t “fixed” to the wall.)

This is FANTASTIC! The suction cup makes it so easy to use with one hand. Perfect circles every time.

When I received the compass, the red slider had popped out of the main body. However, that popped right back in and works fine. Also, I had some of the same issues as others with the knob, but eventually managed to get the knob to turn on the screw threads and it now works fine. I actually bought it for use in D&D and similar games for drawing circles on a vinyl mat. It works quite well for that using my finest-tipped pens and the suction cup means that it holds well on the vinyl without having to worry about poking a hole in the vinyl. It's almost too big for most needs, as standard "1 in equals 5 ft" mapping means that it can do a circular room 340 ft in diameter. If you're a GM looking to draw a bunch of circles or arcs it'll do so quickly and accurately. It's definitely too big to try to use for most spell effects; if you really want to precisely place a fireball, for example, a similar product that's only 6 or 10 inches long will probably work better.

Only thing that would make this better would be to make the whole bigger for the fatter dry erase markers that most teachers use. If you get this, you will need the skinnier ones. But overall it’s a great instruction piece that kids like to use, as well.

So far love it! Suction cup doesn't work for me on wood but i can deal with that by using something else in it's place but like everything else about it!

This is just what I needed for making my barn quilts. The only thing I wish I could do is easily remove the Suction cup so I Can line up my center point better

I have three of these tools. Two of them work perfectly fine, but the third has the same issue I've seen on a couple other reviews. The red middle area which allows the radius of the circle to change would not move, and when I attempted to unscrew it, it broke. Unfortunately it is too late to return the product but I am hopeful that I can contact the seller and get a replacement. For the two that I have that DO work, they are a wonderful and easy to use tool. It seems that the construction is not equally distributed among this entire product line.

I needed something to draw large radii and this fit the bill. I am unable to speak to the suction as I used it on wood. It was easy to lightly press on the suction cup portion and mark the wood using a Sharpie. The circle portions came out perfect every time.

Good

Good useful products

Esta excelente, ayuda mucho a la hora de hacer figuras geométricas. El material es resistente, no es del plástico rígido qué se puede romper en cualquier momento al ejercer presión. Se raya rápido, pero eso no afecta en su uso. Estoy muy feliz con la compra.

Half of the compass was delivered. Missing the radius holes (red piece in the middle). I’m returning it.

cheep material for the price value