Education

* Founder/teacher of the Gregoriaanse Kring, Amsterdam
* Art (history) guide at the Mauritshuis museum, The Hague
* Lecturer at the International Summer Course on Chant, The Hague
* Private music practice (piano, theory, solfege, composition and preparing students for conservatoire admission)
* Regular guest on tv and radio for explorations of all things musical 


Earlier collaborations: 
* Lecturer at the international summer courses and festivals on Gregorian chant of Utrecht,  Den Bosch, The Hague (NL), Essen-Werden (GER), Drongen (BEL) and St. Wandrille (FR)

* Teacher Solfege, Music Theory and Harmony at Nieuw Vocaal Amsterdam, Kleynkoor Academy Noordwijk and Haarlem Cathedral School 

* 2023: lecturer for research on the Utrecht Pontificale (Utrecht University and its Library)

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Interview

on the rediscovered medieval Office for St. Jeroen of Noordwijk, with Wilma Gudmundsson (in Dutch). 

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Projects & methods

In relation to his teaching activities, Tienstra participated in a number of educational projects and methods.

These include the Dutch children's operas Kinderen van de Zaan in the Zaans Museum (2013; see the video) and Help, mijn stem is weg! (2017); contributions to the nationally used Nachtegaal method for solfege; a method of (classical) Harmony for the advanced students of Nieuw Vocaal Amsterdam; lessons in Gregorian chant for children for the Cathedral School St Bavo, and a curriculum of Music (including Solfege exercises and tests) for the aforementioned school.

For the productions of Mahler's Eighth Symphony, Britten's Saint Nicholas and Bach's Matthäus-Passion, Tienstra created scores especially usable by children.

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Historic guide/teacher

In line with his work as a teacher and workshop leader, Tienstra is active as a guide and teacher. He works at the Mauritshuis museum, but also guides in his home town Noordwijk, throughout the Netherlands, or abroad in 'culture trips' in Belgium, Germany, Ireland or Italy. The video shows such a trip made with the Kleynkoor Noordwijk to Venice.

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Annie M.G. Schmidt

The pupils from Haarlem Cathedral School (groups 5-6) performing theatrical songs on texts by the famous Dutch writer Annie M.G. Schmidt, with their music teacher Rens behind piano.