Can you use regular dry erase markers on blackboards? If not, why not? - Quora

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What is some proof or clue that black boards are more or less conducive to learning in respect to white boards? - Quora

If you seen this homeless person laid out on the sidewalk and they're not moving would you help or see what's going on or walk right on by? - Quora

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What is better, paint markers or chalk markers? - Quora

Can you use regular dry erase markers on blackboards? If not, why not? - Quora

What are the advantages of an overhead projector compared to a blackboard and a chalk? - Quora

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