求翻译：我梦想的学校生活是丰富多彩的。一下课，同学们便可以尽情地到操场上玩，因为每一个课间有二十分钟。上课时，老师用3D投影机把这节课上的有意思。同学们可以顺手就好像抓住一个字母或式子。这样，大家就会专心地投入到课堂中来，提高学习兴趣。放学时，我们可以自由选择课外班，参加自己感兴趣的活动。因为学校没有太多的作业。是什么意思？

My dream school life is rich and varied. A class, the students can have fun on the playground, because each class has 20 minutes. In class, teacher used a 3D projector to the class interesting. Students to smoothly as if grasping a letter or equation. In this way, everyone will concentrate on invest