Is it possible to start Singapore Math with an older child?
Singapore Math® is an excellent curriculum for any student. It is important to start at the Primary Mathematics level that the placement test indicates, even if that is back a level or two from their current grade. The investment in building their mathematical foundation is certainly worth the time and effort. It is also important to realize that a student who has completed the set of books that I recommend is fully prepared for Algebra I after completing Primary Mathematics 6.