A little late but this was in The Guardian yesterday:

Harry Gurevitch

Howard Horsley and Robin Bunton
Thursday May 22, 2008

Guardian

Harry Gurevitch, who has died aged 67, was a gifted blues guitarist and the first head of mathematics at Wyke sixth form college in Hull (1987-91), respected nationally as an innovator in maths education. Supportive of egalitarian causes and comprehensive principles in education, he also brought his energy, intellect and experience to Hull trades council and, as a founder member, to his local Stop the War group. He once also featured on a Channel 4 programme, challenging the sensational media coverage of science.
Harry was born into the small Jewish community of west Hull and spent almost all his life in the city. His father was a shoemaker. After the death of his gentile mother, as an infant, he grew up in a Jewish household, but as a teenager - and a non-Jew - he found himself in a confusing world, excluded from key aspects of community life.

Educated at Kingston high school, he graduated in mathematics from Hull University in 1962, and went, full of enthusiasm, to teach in newly independent Kenya (1963-64). He then worked on a kibbutz in Israel, an experience that confirmed his anti-Zionism. Back in Hull, he taught at the David Lister high school (1965-71) and at the Sir Leo Schultz high school (1971-87).

From 1974 to 1988, Harry was a key member of the editorial team of the Schools Mathematics Project, an educational charity that develops textbooks and other teaching materials for the secondary age range. He focused on individualised learning, enabling children to learn through direct experience and progress at their own pace.

For Harry, who found enormous solace in playing the guitar, the blues became his means of self-expression - his dedication to mastering the solo acoustic blues guitar, and the beauty of his slide technique, were legendary. He played to appreciative audiences in clubs across the country, and in venues as far away as Italy and Israel. He contributed to specialist magazines about the history of the blues, and recorded several CDs. These included traditional delta blues as well as his own work, which focused, with his characteristic sense of irony, on politics and the absurdities of human behaviour.

Harry was devoted to his four children and took great pride in their achievements. He supported them through their education to maturity, particularly after his marriage to their mother, Ingrid, ended in the 1980s. He is survived by his children and his second wife, Marcelle.