Gifted Issues Discussion homepage Forums Recommended Resources Singapore Challenging Word Problems discontinued?

For 13 year old you may look into AOPS (Art of Problem Solving) if she is into math.

Singapore Primary edition ends in the middle of the 7th grade (6B). CWP are complementary material for the Primary edition.

Singapore Math provides different programs after Primary Math. Many people use Singapore the Primary edition for the early years but then move onto something else.