Should students be learning while standing?

Should students be learning while standing? Standing desks are becoming more common in the workplace, and now an elementary school in California is swapping out traditional desks for standing desks after the founders of San Francisco CrossFit discovered their own children were sitting for up to six hours a day. Studies have shown that using standing desks correlates with increases in both concentration and daily calories burned, and could dramatically help in the battle against childhood obesity. (Fast Company)