Curriculum Guidelines of 12-Year Basic Education Reform emphasizes on cultivating students' core competence in order to face rapid change in the future. Responding to the reform, deep learning is a critical bridge for transferring students' knowledge to new situations. This paper indicates that deep learning is immersive process of learning deeper and further. The competence of deep learning cannot be developed rapidly in terms of mechanic reaction, surface learning, pile of information, or helpless learning. To facilitate deep learning, teaching less is more. Less in commanding, competition and formalism; more in autonomy, admiring and waiting.