News Secondary teachers reach deal with Trillium Lakelands District School Board SHARE ON: Andreas Pandikiu, contributor, Thursday, Jun. 30th, 2016 The Trillium Lakelands District School Board has ratified its contract with its secondary teachers. A release by the board says both parties are pleased to have reached an agreement before the start of the next school year. A central agreement by the Ontario Secondary Teachers Federation and the government was reached earlier this year, but new bargaining laws mean a local deal also had to be reached. TLDSB secondary teachers ratified their agreement on Tuesday.