Bildkollektion

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a music lesson with teacher Christian Mueller at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a music lesson with teacher Christian Mueller at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during an English lesson with teacher Karl Stadler at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Pupils of the third grade class W15d pictured during a mathematics lesson with teacher Jean-Louis Féraud (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

A pupil of the third grade class W15d pictured during a mathematics lesson with teacher Jean-Louis Féraud (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

A pupil of the third grade class W15d pictured during a mathematics lesson with teacher Jean-Louis Féraud (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Pupils of the second grade class P16g pictured during a Latin elective course lesson with teacher David Krebs at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 14, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in an economics and law lesson with teacher Peter Aebli (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 6E pictured during a French lesson with teacher Astrid Marchetto-Spies (far right) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in an economics and law lesson with teacher Peter Aebli (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in an economics and law lesson with teacher Peter Aebli at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Teacher Christoph Mathys pictured during an economics and law main subject lesson with the third grade class W15d (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Class 5U pictured during an informatics lesson with teacher Rudolf Schmid (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 5U pictured during an informatics lesson with teacher Rudolf Schmid (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 3E pictured during a biology lesson with teacher Martin Hemmi at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 3E pictured during a biology lesson with teacher Martin Hemmi (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 3E pictured during a biology lesson with teacher Martin Hemmi at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 3E pictured during a biology lesson with teacher Martin Hemmi at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured taking an exam during natural science project work with teacher Thomas Ortega at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A pupil of the class 2A pictured taking an exam during natural science project work with teacher Thomas Ortega (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured taking an exam during natural science project work with teacher Thomas Ortega (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Pupils of class 2A pictured during an English lesson with teacher Karl Stadler (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Pupils of the second grade class P16g pictured during a German lesson with teacher Johann Kampermann (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 14, 2018. Pupils use a smartphone to do some research for a speech. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

A pupil of the second grade class P16g solves a quiz on a smartphone during a Latin elective course lesson with teacher David Krebs (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 14, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

The third grade class W15d pictured during a mathematics lesson with teacher Jean-Louis Féraud (left) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Pupils in a hallway at the Cantonal School Solothurn, Switzerland, pictured on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

A pupil of class 2A pictured during a French lesson with teacher Astrid Marchetto-Spies (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A pupil of class 2A pictured during a French lesson with teacher Astrid Marchetto-Spies (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A pupil of class 6E pictured during a French lesson with teacher Astrid Marchetto-Spies (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 6E pictured during a French lesson with teacher Astrid Marchetto-Spies (center) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a French lesson with teacher Astrid Marchetto-Spies at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE SOLOTHURN

A pupil of the second grade class P16g pictured during a French lesson with teacher Nina Stadler (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 14, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

A tablet computer, a netbook and other things on a desk pictured during a Latin elective course lesson of second grade class P16g with teacher David Krebs at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 14, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in theatre class with teacher Sabine Aebli (center) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in theatre class with teacher Sabine Aebli (in the background, in black) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ SCHULE SUHR

Pupils of gymnasium classes Bez 2c and Bez 2d play football during a physical education lesson, pictured at a sports field of the Public School Suhr, Canton of Aargau, Switzerland, on June 25, 2018. The Public School Suhr consists of kindergartens, primary schools and senior classes. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a physical education lesson with teacher Mirka Jacober (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a physical education lesson with teacher Mirka Jacober (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ SCHULE SUHR

Pupils of gymnasium classes Bez 2c and Bez 2d play floorball during a physical education lesson, pictured in a sports hall of the Public School Suhr, Canton of Aargau, Switzerland, on June 25, 2018. The Public School Suhr consists of kindergartens, primary schools and senior classes. (KEYSTONE/Christian Beutler)

SCHWEIZ SCHULE SUHR

Pupils of gymnasium classes Bez 2c and Bez 2d play basketball during a physical education lesson, pictured in a sports hall of the Public School Suhr, Canton of Aargau, Switzerland, on June 25, 2018. The Public School Suhr consists of kindergartens, primary schools and senior classes. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a French lesson with teacher Astrid Marchetto-Spies (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ SCHULE SUHR

Books in a the class room of gymnasium class Bez 1d, which is preparing for the youth fest, pictured at the schoolhouse "Bezirksschulhaus" of the Public School Suhr, Canton of Aargau, Switzerland, on June 26, 2018. The Public School Suhr consists of kindergartens, primary schools and senior classes. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

The third grade class W15d pictured during a geography lesson with teacher Tobias Stuedi (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during a French lesson with teacher Astrid Marchetto-Spies (in the far background) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Pupils of class 2A use an interactive whiteboard during a French lesson with teacher Astrid Marchetto-Spies (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A sixth former (right) uses Lego Mindstorms to make robots in a computer science complementary subject lesson with teacher Timon Ruther (left) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers use Lego Mindstorms to make robots in a computer science complementary subject lesson with teacher Timon Ruther (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers use Lego Mindstorms to make robots in a computer science complementary subject lesson with teacher Timon Ruther (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A sixth former in a main subject art lesson with teacher Michael Honegger (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A sixth former in a main subject art lesson with teacher Michael Honegger (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A sixth former in a main subject art lesson with teacher Michael Honegger (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in a main subject art lesson with teacher Michael Honegger (left) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in a main subject chemistry lesson with teacher Christian Ester (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

A sixth former in a main subject chemistry lesson with teacher Christian Ester (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Sixth formers in a main subject chemistry lesson with teacher Christian Ester (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 17, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Pupils of the third grade class W15d pictured during a physics lesson with teacher Fabienne Freiburghaus (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

The third grade class W15d pictured during a physics lesson with teacher Fabienne Freiburghaus (left, standing) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE SOLOTHURN

Pupils of the third grade class W15d pictured during a physics lesson with teacher Fabienne Freiburghaus (not in the picture) at the gymnasium of the Cantonal School Solothurn, Switzerland, on May 15, 2018. The Cantonal School Solothurn consists of a gymnasium, a specialized upper secondary school (Fachmittelschule FMS) and a secondary school (Sekundarschule P), which prepares the pupils for the gymnasium. (KEYSTONE/Christian Beutler)

SCHWEIZ KANTONSSCHULE GLARUS

Class 5F pictured during a chemistry lesson with teacher Stefan Gander (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 5F pictured during a chemistry lesson with teacher Stefan Gander at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 5F pictured during a chemistry lesson with teacher Stefan Gander at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 5F pictured during a chemistry lesson with teacher Stefan Gander (not in the picture) at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Class 2A pictured during an English lesson with teacher Karl Stadler at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)

SCHWEIZ KANTONSSCHULE GLARUS

Teacher Karl Stadler pictured during an English lesson with class 5F at the gymnasium of the Cantonal School Glarus, Switzerland, on May 8, 2018. The Cantonal School Glarus was founded in 1956 and consists of a gymnasium and a specialized upper secondary school (Fachmittelschule FMS). (KEYSTONE/Gaetan Bally)