Very colorful textbooks with lots of illustrations may also not increase learning.Wow-- someone should alert math textbook developers.
And the makers of Junior High/High School Planners. Our schools/districts try to "sell" us these crazy high school planners as necessary for the child to be organized. They are so crammed full of of stuff (school spirit stuff, ads) that it's hard to find the calendar planner stuff and thus IMO very hard to use. The ONLY thing useful in it is a the schools schedule. Everything else is just a distraction and makes them hard to use, thus my kids never used them even if I bought them. Cheep empty except for the dates planner from the office store much more effective.
