Tag: HSA.CED.A

What’s with the plovers?

Cute little birds.  Piping plovers are presently nesting on beaches along the Atlantic coast. Consequently beaches are often roped-off or closed to protect their nests and chicks.  Is this conservation working?  What should the numbers be like after so many…

QR codes ???

Your students have probably seen these images around and might not know why they are becoming popular for smart phone scanning … and possibly dangerous.  Students figure out the number of permutations of symbols that are possible with these 2-d…