This simple, first-published article by Mario Montessori was written in Kodaikanal, India, and reveals a great Montessori truth that has never been so explicit: There are developmental stages for practical life that cross over into nature study and living experiences. Although more abstract, the second plane has a strong practical life component…

The authors demonstrate that the timing and sequencing of target durations require low-level timing and executive control. Sixteen young (M-sub(age) = 19 years) and 16 older (M-sub(age) = 70 years) adults participated in 2 experiments. In Experiment 1, individual mean-variance functions for low-level timing (isochronous tapping) and the sequencing…

This paper describes life-span development of understanding about pendulum motion and effects of school science. The subjects were 2,766 people ranging from kindergartners up to 88 years senior citizens. The conflict and consensus between children and their parent's understanding of pendulum motion were also analyzed. The kindergartner's…