Handbook for Secondary Mathematics Teacher is a compilation of articles written by eight teachers in Singapore. It does not give lesson plans for specific levels, but gives ideas from experienced teachers.
 
The first section gives a list of common errors made by students in Secondary Mathematics, and a short diagnostic test.  The second section gives some ideas for integrating activities into a lesson, motivating students, and teaching some advanced concepts from the Additional Mathematics.  The third section gives some ideas for games in mental math, algebra, trigonometry, and graphing functions.  The fourth section has some ideas for using the dynamic geometry software programs Graphmatica and Geometer’s Sketchpad in the curriculum.

 

The book is not separated by grade levels.