Dr. Greenspan has lectured around the world for Dental groups and for may Synagogues and Jewish Schools.

All Jewish topics include a multimedia presentation and are enjoyable, engaging and unusual.

Some topics are:

Tekhelet- A multimedia presentation on the history of tekhelet, tzizit and colors in the ancient world. It includes chemistry, biology and a hands on dying demonstration.

Halachic archeology- An understanding of the Temple Mount from Jewish sources. Talmudic references to archeological topics.

Halachic Adventuring- A look into the world of lost minhagim, of tiny and large distant communities from Riga to Gibraltar, Istanbul to Addis Abbaba. It is a world wind trip around the Jewish world and understanding the minhagim and mesorot of each community.

The mesorah of exotic kosher animals- The simanei kashrut as you've never seen them. A hands on dissection of the topic in an attempt to hold onto the mesorot of disparate Jewish communities around the world.

The search for the perfect etrog- Understanding the halachic history, geographic distribution and botany of the arbah minim. A look into Yemen, Southern Italian and Moroccan etrogim.

The history of matzah- Pictures, stories and the halachot of matzah from archives in four continents around the world.