hi hippo,
i have purchased lots of assessments books for my girl, but she is unable to finish all of them.
as for maths, i found the "MATHS-CA and SA Papers" by DR. SHEEJA, published by Success Publications quite good-have lots of thinking quetions, i used this book to teach her during her first year in primary school. i also bought past year papers for her to do. in addition, i also bought "Top Schools' Exam Papers & Model answers" published by Amazing Books and "IQ Maths" published by CASCO to let her practice. when my girl is K2, i used "Challenging MATHS" published by EPH to teach her. i found lots of MATHS assessment books do follow MOE syllabus.
for chinese, books published by EPH, Victoria Publicaiton, LEARNERS do follow MOE syllabus closely but you have to buy the latest version. some books that focus specifically on comprehension are available too.
for english, i bought books such as: "Classroom Comprehension", "Comprehension Graphic Stimulus Cloze", "Cloze Fast Forward", "English Exam Papers" published by EPH, CASCO, Success Publications, LEARNERS, SAP for her to practice. as i come from a chinese speaking family, i am unable to help her much in her english, so i let her have tuitions on this subject. i teach her personally in chinese and maths.
for science, as my girl is only P2 this year, i have not yet bought any science assessment book.
hope this helps^^