This book titled "New Concepts in Mathematics for Senior Secondary Classes" is about Mathematics has sub topis are Algebraic geometry, Applied geometry, Mensuration (2D,3D),How to find roots of Biquadratic,Cubic and Quadratic Polynomial Equations and to find their roots,to find median length and angle bisector length of a triangle,to work out three angles of a given triangle with the help of side lengths ,to find cube roots and square roots of the given perfect cubic and squared numeric values,to find circumference and area of circle,to find surface areas and volumes of spheres,to find surface areas and volumes of pyramids,Tetrahedron,cube, cuboids,to find areas of cyclic and non-cyclic Quadrilaterals,Law of sines,Law of Cosiness,to find areas of trapezium and triangles with different methods This book can also be called a book derivations of results for senior secondary classes this book has come into existence by doing lots of hardworks and this book is based on ideas that came into my mind during the long teaching experience,I think this book will be very helpful for concerned students Thanks