| http://www.w3.org/ns/prov#value | - One (90 minute period) day in my honors class I gave a picture (with a prominent shadow) and asked what time of day is it?I handed out three hint tokens and left the rest to them.They could use any resource, including the Internet, doing experiments with flashlights, and going outside to do measurements (although for the last the whole class had to go at once).It was both a.) playing with math b
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