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
Also has anyone seen bigger than 5mm ?