I am finding that I have to teach in rooms with only low-contrast boards including visualizers and dry wipe marker boards. My lecture theatre has quite a large white dry wipe board but we only seem to have white board pens which make a line about 2 or 3 mm wide, which is invisible to much of the audience even in the best lighting conditions. A quick google indicates that dry wipe marker pens are available up to 5mm.
Does anyone have experience of using these pens? In particular
- are the lines big enough to be visible in a large lecture theatre
- Do they last a lecture
- Are the alcohol fumes from them a problem?
There are some reviews on Amazon but they do vary by make from one to
four stars.
Also has anyone seen bigger than 5mm ?
I use Expo low odor markers. I got the 12-pack at Staples, and in the fall it lasted all semester. I don’t see a measurement in mm. They’re called chisel, and are plenty big enough to be seen from far away. (I don’t teach in a large lecture hall, so I can’t promise. But I think many of the colors show up better than chalk.)
We know whiteboards are fine for small classes. Its the big classes
where the problem lies.
http://www.tigerpens.co.uk/acatalog/Artline_5109A_Whiteboard_Marker_Chisel_Tip_Big_Nib.html
20 and 30 mm also available.
Really. That’s surely too big?
The 10mm one could be OK. If it is chisel-tipped, you can control the width of the line.