This workbook is contain good problems and also some investigations project. It is designed for Secondary students, grade 7. and it is best for GCE 'O' Level students (especially Singaporean students). Easy to read and understand, also good layout with some notes about old Mathematicians are some keys that make this book really recommended.. at least by me.. +_+
After this i also will upload some notes (mind maps) about some of the units inside the book.
Hope that will be useful for you. thx!