T_M, the flying school I run used to operate a tiger moth, and we never dreamt of allowing students to use her as a regular training platform, they handle like bricks and the inflight vis is equally as bad. They are a lovely aircraft for trial lessons, or used for differance training, it can be a great experiance, but that is as far as they go.
I have to question your flying schools motives for letting you use the Tiger Moth as a full time training platform.