What it does is -- this is what's happening in Los Altos -- it frees up time -- it's the blocking and tackling, making sure you know how to move through a system of equations, and it frees up time for the simulations, for the games, for the mechanics, for the robot-building, for the estimating how high that hill is based on its shadow.
这就是在Los Altos 学区所进行的- 是因为这样学生有了更多的自由时间。 这样能实现分组处理和解决问题的能力， 确保学生明白如何解方程组， 它同时也腾出时间让学生进行模仿，游戏， 机械操作，和机器人制作， 通过影子来估算山高。