Magnetic Dry Erase Straight Edge - 24” - Jumbo Teaching Ruler - Measurement Tool for Whiteboards and Chalkboards

These geometry teaching tools were super helpful this year, particularly the protractor. The triangles have smaller triangle cutouts that can be traced onto the whiteboard which is useful when you need a smaller triangle. The tools are a bit larger than I imagined; almost too large. The 4 I ordered take up most of an entire 3x4’ whiteboard when not in use. The quality on these is good. They are sturdy and I like the big handles. Regarding the magnets, mine give me no issues at all. The magnets are just right. However I received an extra ruler and triangle and gave them to a teacher friend down the hall. The ruler magnetizes to her whiteboard just fine, but the triangle slides off. The triangle I gave her is ever so slightly concave from sitting in my vehicle for several weeks, and that may be why. I give these 5 stars and definitely recommend them to all my teacher friends.

I joke about the fact (and some students tease me) that I can't draw a straight line to save my life. I appreciate that this ruler is large enough for whiteboards, is magnetic, and has a handle. The handle keeps it stable and easy to relocate.I wish the magnets were a bit stronger, but that is my preference, not really a criticism.

I love the handle on this ruler - makes keeping it attached to the white board handy. I had to add my own magnets to the back, because it barely stuck to the board, though. If stronger and more magnets were added, it would be a 5 star purchase.

This stayed on my board with no problems. After reading reviews, I had planned to add magnets. I did not need to. Makes drawing graphing lines so easy!

Number lines, geometry, and graphing - and a great flipchart holder when creating anchor charts

This ruler, while it does indeed hold on a whiteboard, could have been built in a more solid manner. It "feels" cheap in the hands and in use, however has a handle to hold down while drawing straight lines. Material feels like hardened Styrofoam. Makes for great straightedge, and the size is very good. Does not scrape/scratch whiteboard enamel.As far as the magnets, they are literally glued onto the back. I would have expected as continuous magnet but as of the time I see no better product out there. Before you buy, be sure that your whiteboard is indeed magnetic.

I needed a straight edge for my dry erase boards at work and this has worked great. Some reviews mentioned this product coming bent but mine was fine.

Magnet isn’t strong enough to hold its place!