I even got a box of big sticks (roughly 6" x 1") of blue "railroad" chalk for additional highlighting. I usually hold white and yellow chalk, writing with white and highlighting with yellow. But I use nothing but chalk every day - many of my colleagues do as well - and it works great. Some have minor dings, and if the surface has gotten "slippery" it's unusable. They're pretty good, but I'm not sure they're made anymore. When we had our building renovated, we had all the old slate boards removed and set aside, then reinstalled when the classrooms were done. The modern green-colored boards are junk. Most rooms had two projectors, and the touchscreen on the right selected an input for each projector (desktop computer, laptop, DVD player, visualiser etc). There was no chalk dust, no marker smell, no dirty boards, no worn-out faint markers, no mistakes with permanent markers. They could show a page from a book, or bits of a robot or circuit board. The lecturer could write with whatever pens they wanted could continue from the previous lecture easily could look forwards at the students rather than having their back to the class. The "board" (the projector screen) was at a height that everyone could see. It's a high resolution camera pointing straight down at an evenly-lit sheet of ordinary A3 paper.
Do you mean things like ? That's my university, which was using them 12 years ago while I attended.
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