Monthly Archives: March 2015


Easter Egg Themed Periodic Table
Happy Easter! Finding hidden eggs is one of the fun parts of the holiday. Hunt your favorite element with this Easter Egg Hunt on the Easter periodic table wallpaper. Each dyed egg contains the element’s atomic number, symbol, name, and atomic mass. The different egg colors represent different element groups. Click […]

Easter Periodic Table Wallpaper


This table contains values for sine, cosine and tangent for angles between 0 and 90º. All values are rounded to four decimal places. Click the image for the full-sized image or download the PDF version. The downloadable trig table PDF is optimized to fit on a single 8½ x 11″ […]

Downloadable Trig Table PDF


45-45-90 Right Triangle 1
Right triangles are central to trigonometry. Two special right triangles appear over and over in standardized exams and homework problems. These triangles are “special” because they have simple ratios between the lengths of each side. The first is the 30-60-90 triangle. The 30-60-90 is named after the interior angles of […]

Special Right Triangles





Viking at the Saga Museum in Reykjavik 1
I got off to an adventurous start, even before reaching Iceland. It snowed in Boston, my point of departure to Reykjavik, grounding planes and spreading misery. Logan International Airport sent out the snowplows and the IcelandAir pilot (a woman… yes!) skated the jet down the runway and into the air. […]

Getting to Iceland – The Adventure