Hi Little bb,GD and Shichida are both very good.If your child is already comfortable with Shichida, I would stick with it.GD don't flash cards fast and they seem to incorporate more physical exercisesin their classes.Even thought I find GD good, I find they have still a limited resources of flash card materials.You may want to go to http://www.rightbraineducationshop.com/right_brain_educationandhttp://www.rightbraineducationshop.com/gymnademics_singapore.to read more.Best of LUCK! :celebrate: