Mark C.

Physics degree, teacher for 18 years, perpetually confounded by the wilful ignorance of some, continually surprised by the willingness to learn in others.

The plural of anecdote is *not* evidence.

1,558,010 students helped

Level 17 in Physics Level 12 in Astronomy Level 7 in Prealgebra Level 7 in Chemistry Level 6 in Socratic Meta Level 6 in Earth Science Level 6 in Geometry Level 5 in Algebra Level 5 in Astrophysics Level 4 in Anatomy & Physiology Level 3 in Psychology Level 3 in Environmental Science Level 3 in Biology Level 2 in English Grammar Level 1 in Trigonometry Level 1 in Precalculus Level 1 in World History