Sam (48) died on February 13 following a two-year battle with bowel cancer.
Headteacher Nigel Ryan says Sam, who headed the business studies and economics department, will be “best remembered at Spalding Grammar School through his passion for learning and life”.
Some of Sam’s colleagues will run the Langtoft 10k in May to raise money in his memory for Bowel Cancer UK.
Sam joined the school in 2002 and, as part of his drive to challenge the brightest students, single-handedly and very successfully reintroduced A-level economics to the 6th form curriculum in 2009.
He became department head in 2012.
Sam was known for rigorously researching and employing the most effective cutting-edge teaching ideas – students thoroughly enjoyed his lessons and gained a deep understanding of business and economics.
Mr Ryan said: “Sam was totally committed to enabling students to be responsible for, and self-confident in, their own learning.
“He appreciated the diversity of students, equally giving his time generously to mentor individual students who struggled for personal or academic reasons and to raise the aspirations of the brightest students to succeed at the top universities.
“Sam was very much prepared to put himself out to help others, both by direct involvement – especially through long distance running – and by the numerous events he organised for students to get involved in, from Santa runs around school to eyebrow shaving, charity boxing matches and chilli eating.
“His highly competitive nature and cheer-leading skills came to the fore when, as head of Hobson House from 2008 to 2012, there was only ever going to be one winner of the inter-house competition each year.”
Former students, staff and governors are invited to attend Sam’s funeral service and the special assembly, but are asked to let the school office know in advance on 01775 765800 .
Sam’s funeral takes place on Thursday at Lincoln Crematorium with mourners gathering at 12pm for a 12.30pm start. The suggested dress code is “colourful”. The school assembly starts at 10.30am on Monday, March 9.
Donations in lieu of flowers can be made at www.justgiving.com/remember/168928/Sam-Walker
There are opportunities on the site to donate to Sam’s favourite cause, Medecins Sans Frontieres, as well as Cancer Research UK and Bowel Cancer UK.