I am contemplating of changing my current math curriculum to either CTC math or Teaching textbook but I’m not sure how to go about it. Our current curriculum uses a spiral method so I’m kinda leaning on TT though a little curious on CTC math as well. Do I need to let my child take a diagnostic test or just let her start from the very beginning on the new curriculum? Any advice/thoughts on how to efficiently change your math curriculum in the middle of the school year will be appreciated. Thank you!