HelixMagnetic Classroom Whiteboard Geometry 4 Piece Set - Compass - 2 Triangles - Ruler - Protractor

I was looking for large tools to teach my homeschooler geometry. This kit has been amazing! I definitely recommend it.

Very nicely made. I like the way the long scale disassembles. The case is pretty useless in that the formed plastic for holding the parts is poorly designed. Using the compass requires 1) get the compass center suction point really firmly attached. Then 2) draw the circle holding the compass with only one hand at the hinge point. Takes some practice, but it's a very nice unit once you've mastered it. One thing I wish is that the marker holder attachment was designed to "hug" the marker rather than pin it with a set screw. It take an adult to tighten it enough to hold well, then the marker gets squished, but it still works. I may try to modify it to work better.

Large and visible. Great for work on the white board

Excelente inversión. Aunque si pensé sería un poco más grande.

I like the way the protractor and triangles work. I like the storage case. The meter stick needs stronger magnets; it doesn’t stay in place and frequently slips while connecting points. The compass is like all other chalkboard/dry erase board compasses - flimsy. The compass takes practice, as do other versions that I’ve used through the years.

I bought this for my son who uses a large whiteboard for math stuff that involves graphs, straight lines, triangles, circles, etc. The pieces are all bright yellow and have bold markings for measurements, I'm sure these are intended for classroom demonstration. The tools are very magnetic and stick well, they don't move when you're drawing against them but the handles make it easy to pull them off and reposition. The compass however is almost comical with huge 18" arms, it'll take some practice to tame.

I’m glad I got them, but be warned that the compass is very hard to use! I’ve spent hours practicing and I’ve gotten better, but it’s still very hard to get right and to perform constructions with. However, I’m sure they’re all hard to use and when it does work out it’s a great teaching tool since I can’t go to every students desk to do the constructions with a tiny compass. The triangles and protractor are great and I use the ruler constantly for all sorts of purposes! The magnets could be stronger though and I find that they slide quite a bit.

The locks that come with the triangles are too big to fit in the slots and are useless. The compass pieces also do not fit together snuggly and the compass moves too much on the board to be useful. It will be going back...