The Gatehouse Learning Centre was "known for its distinguished graduates as well as its integration of exceptional students into the regular classroom." Wallbank has lectured at a wide variety of colleges and conferences as well as university courses and lectures under various titles. In particular, she designed the distance learning course of the College of Modern Montessori. In retirement in Dorney, she was called upon by Eton College as a visiting teacher. In 2007 and 2008, in her late eighties, she went on Montessori World Tours giving lectures on Montessori education.
