Maria Blanton, Bárbara M. Brizuela, Angela Murphy Gardiner, Katie Sawrey, Ashley Newman-Owens, A progression in first-grade children's thinking about variable and variable notation in functional ...

A total of n=602 students (59.5% female) from academically selected schools in Germany were tested at three time points--end of Grade 7, end of Grade 10, and middle of Grade 12--in order to ...