Nowadays Vipassana meditation is mainly practiced in Burmese, Sri Lankan and Thai temples and is based on the handed down teachings of the Buddha, namely, the 4 foundations of mindfulness. The Vipassana meditation technique in the courses is passed on in the same way as it is traditionally practiced in the temples of Northern Thailand under the guidance of the Ven. Ajahn Tong (Phrathepsiddhajahn). It is an intensive form of the Mahasi Sayadaw technique which includes both walking and sitting and is a traditional form of Buddhist meditation.
Adhering to the Buddhist religion is neither presumed nor expected.