The Kadampas monks were instrumental in spreading Tibetan Buddhism not so much for developing their own strain and teachings of Buddhism, but rather through the creation of programs for advancement towards Enlightenment and progress through Tibetan Buddhist teachings. These monks also develops preaching techniques that proved highly effective and popular. The Gelupkas were similar to the Kadampas in many respects, but placed a greater emphasis on the doctrine of emptiness than the older school.
Though the Buddhism that the New Translators found in India was largely the same as what they had left in Tibet, there were significant differences that were observed and developed out of this return to the Indian Sanskrit scriptures. The Sakya lineage was formed from reinterpretations of Sanskrit texts from a Tibetan Buddhist perspective, explaining both the similarities and the differences between the Sakya and the Nyingma schools.
One of the unique features of the Sakya school is its teaching of the Lamdre, where the ultimate result of the meditative act is the act itself, in a circular rather than emptying process.
Gampopa was instrumental in the founding of the Kagyu monastic order, teaching first the Kadampa lineage of Buddhism to his students and following this with the tantric paths that would come to define the Kagyu tradition. This synthesis is similar to that achieved by the Indian siddhas, in that the unification of differing perspectives enabled the achievement of a higher.