We're using Horizons 2 for my 2nd grader. I want to use Singapore Math next year (with Horizons) for 3rd grade. However, when I looked at the placement test 2A and 2B, I realized that there will be many things my daughter doesn't know (how the questions are presented, division, measurement - which we haven't covered). Is it ok to use 2A NOW together with Horizons and then move on to 2B so we'll be able to do 3A next year?
Thank you!