I. Perspectives.- 1 Introduction.- 2 What? How? For Whom? Why?- 3 A Brief History of Mathematics Education.- 4 What is Mathematics?- 5 Mountain Climbing.- 6 Jazz/Pop/Folk vs Classical Music.- 7 Virtual Reality and the Matrix.- 8 Scientific Revolutions.- 9 Education is based on Science.- 10 The Unreasonable Effectiveness of Mathematics in the Natural Sciences?- 11 Do we live in 'The Best of Worlds'?- 12 The Reasonable Effectiveness of Computational Mathematics!- 13 The Need of Mathematics according to the Mathematics Delegation.- 14 An Agenda.- II. Essence.- 15 A Very Short Calculus Course.- 16 The Solar System.- 17 Turbulence and the Clay Prize.- III. Appendix.- 18 Appendix: The Mathematics Delegation and its Task.- 19 Preface to Body&Soul.- 20 Do Mathematicians Quarrel?