# A Quartet of Ellipse Constructions

It's the season for NCTM regional conferences, and I'm presenting sessions on conic section construction techniques in both Richmond and Houston this month. For those of you who can't attend, here's a peek at what I'm demonstrating.
The 17th-century Dutch mathematician Frans van Schooten developed "hands-on manipulatives" centuries before the term became popular in math education circles. Below … Continue Reading ››