‘Cool?’ was first published in Physics Education in 1969 (Mpemba and Osborne 1969 Phys. Educ . 4
[http://dx.doi.org/10.1088/0031-9120/4/3/312] 172 [http://dx.doi.org/10.1088/0031-9120/4/3/312] ).
Written by Erasto Mpemba and Denis Osborne this paper has been cited 26 times to date, has led to
hundreds of articles being written and has a story behind it to inspire every student. We asked
Becky Parker, the director of and inspiration behind the Institute for Research in Schools (
www.researchinschools.org/ [http://www.researchinschools.org/] ), to write a commentary.