A life's time for mathematics education and problem solving

After an introduction by Benjamin Rott, this Festschrift on the occasion of András Ambrus’ 75th birthday comprises articles by the following authors: • Krisztina Barczi-Veres • Laurinda Brown • Regina Bruder • Olive Chapman • Marianna Ciosek • Bronislaw Czarnocha • Lothar Flade & Manfred Pruzina • Torsten Fritzlar, Maria Kötters & Karin Richter • Gunnar Gjone • Stefan Götz • Günter Graumann • Olga Graumann • Ján Gunčaga & Péter Körtesi • Lenni Haapasalo • Frank Heinrich • Eszter Kónya & Gyöngyi Szanyi • Ana Kuzle • Anu Laine & Maija Ahtee • Leong Yew Hoong, Romina Ann Yap, Toh Tin Lam, Tay Eng Guan, Quek Khiok Seng, Toh Pee Choon, Teo Kok Ming & Ho Weng Kin • Shuk-kwan S. Leung • Nicolina A. Malara • John Mason • Jarmila Novotná & Hana Moraová • Antoni Pardała • Erkki Pehkonen • Klára Pintér • Benjamin Rott • Alan H. Schoenfeld • Fritz Schweiger • Johann Sjuts • Jorge Soto-Andrade • Gordana Stankov • Martin Stein • John Sweller • David Tall, Nic Tall & Simon Tall • Stefan Turnau • Shlomo Vinner