Schools were ultimately barred from sending pupils to the event by then-Education Secretary Michael Gove, who warned them doing so might breach their obligation under the Education Act to give children "a balanced presentation of opposing views" when learning about political issues.
Ms Jasciewicz was listed as a participant on the event's website. In 2018, her presence at the World Transformed conference, organised by pro-Corbyn campaign group Momentum, was branded "highly inappropriate" by Labour deputy leader Tom Watson.
The 2011 festival had been organised by a branch of the Palestine Solidarity Campaign.
Board President Vivian Wineman said at the time: "I can think of few organisations which would be less appropriate to run a workshop in a school than the PSC."
A Board spokesperson told the JC: "Far from denouncing all things Palestinian as Mr Corbyn suggested in 2011, the Board of Deputies is active in promoting peace between Israel and the Palestinians.
"Indeed, our Invest in Peace programme through which we have brought Israeli and Palestinian peace campaigners to audiences around the country is perhaps an approach that the Labour Party could seek to emulate.”
