After World War II, the tambura is already deeply rooted in primary schools, the broadest base of the educational system. Almost every major elementary school, and many smaller ones in smaller towns, have their own tambura orchestras and ensembles, which become the bearers of the progress and development of tambura music.
In this period, tambura orchestras also operate at grammar schools in Varaždin, Sisak and Požega, and sometimes also in other vocational schools.
Special merits for the development and spread of tambura music belong to the teachers' schools in Osijek, Slavonski Brod, Pakrac, Petrinja, Čakovec, Zagreb, Križevci and Gospić, where since 1951 the optional subject Tambura has been taught. Those schools had their own tambura orchestras, from which many music pedagogues in the field of tambura music came from.
In 1951 the Higher Pedagogical School opens in Zagreb, where the teaching of tambura is introduced as a subject at the Department of Music lasting three years, or six semesters. The class is led by the famous tambura pedagogue Slavko Janković, and it was the first legal appearance of tambura in the curriculum of a higher educational institution. At the same time, one-year courses are organized where future teachers of music education are trained, and thus leaders and conductors of tambura orchestras.
In addition to learning how to play the tambura in the educational system, since 1951 the Union of Croatian Music Associations and Organizations (later the Croatian Educational Assembly) has been organizing music courses on the Adriatic coast where playing the tambura is also taught. The courses are held during the summer holidays, sometimes for a month, the first lecturers being Slavko Janković and Radovan Brdarić. The first such course is held in Split in 1951, and after that courses are held in Senj, Poreč, Cres, Crikvenica...
In addition to courses organized by the Union of Croatian Music Associations and Organizations, courses and seminars of the Association of Croatian Music Pedagoguesare held. A six-day seminar is held in Dubrovnik from August 27th until September 3rd, 1959, which is attended by 256 participants. At the seminar, in addition to theoretical music subjects: piano, violin, cello, flutes, tamburas and singing are taught as well.
In 1954, the Tambura Orchestra of the Teachers' Training Centre is founded in Slavonski Brod under the leadership of pedagogue Josip Nađ, and three years later the tambura orchestra starts working at the oldest school in Slavonski Brod - Ivan Goran Kovačić Primary School.
In the late 1950s in Osijek, the Slavonian Tambura Association “Pajo Kolarić” opens a tambura school.
In 1958, Željko Bradić founds a tambura orchestra in the “Janko Mišić” Primary School in Samobor and later the Tambura Orchestra of Samobor Grammar School from former primary school students.
In 1971, a series of expertly and thoroughly programmed tambura seminars begin in Ilok, where the technical problems of playing were approached in a more studious manner for the first time. The lecturers at the seminar are Lovro Županović, Tihomil Vidošić and Željko Bradić.
From 21 to 26 August 1972 the Seminar for conductors of tambura orchestras and leaders of small ensembles is held in Slavonski Brod.The demonstrator is the Tambura Orchestra of Vladimir Nazor Primary School, and the lecturers at the seminar are Tihomil Vidošić, Julije Njikoš, Teodor Boch, Vlado Seljan, Ivo Furić, Željko Bradić and Mihael Ferić.
From 1973 to 1976, the seminar is hosted in Posedarje, and the demonstrator is the Tambura Orchestra of the “Braća Ribar” Primary School run by Andrej Jakuš. This orchestra is founded in 1968 and very quickly gains the status of one of the best primary school orchestras.
From 1977 to 1981, Zadar hosts the seminar, and the demonstrator was the “Veljko Vlahović” Primary School Tambura Orchestra (from Zadar) run by Andrej Jakuš. The renowned lecturers mentioned above are joined by Josip Kaplan, Vladimir Kranjčević, Adalbert Marković, Vladimir Tomerlin and Milan Jadrošić.
In the period from 1980 to 1984, the Osijek Institute for the Improvement of Basic Education and its advisor Radovan Brdarić organizes seminars for leaders of tambura orchestras of the neighborhood for GD system during the summer holidays in Našice and Velika. The seminars are primarily intended for music teachers and orchestra conductors, and the lecturers are Mihael Ferić and Radovan Brdarić. Similar seminars are held in the Zagreb region under the leadership of lecturer Željko Bradić.
From the beginning of the 1970s up to the end of the 1980s, as part of the Workers’ Cultural and Artisitic Association “Đuro Salaj” in Slavonski Brod, every fourth year a tambura school for primary school-aged children, mainly for fourth and fifth graders, starts working.
In 1987, with the unification of all secondary schools in Požega into “Zvonko Brkić” high school, the tambura orchestra of that school is created under the leadership of Veljko Valentin Škorvaga.
In 1993, the Batorek Tambura School, the first private tambura school founded by Franjo Slavko Batorek, begins operating in Osijek.
In 1996, the Slavonia and Baranja Folklore Seminar is launched in Vinkovci(it later changes its name to the Pannonian Zone Folklore Seminar), where a tambura course is held.
In the last decade of the 20th century, there is a decrease in the number of classes of music education in primary schools, so tambura orchestras disappear in many schools. Only those school orchestras that are led by enthusiastic teachers - "tambura players with heart and soul" survive.
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