How to be mindful while studying? I am a science student at an university and I practise mindfulness in the Mahasi tradition. My question is, how can I be mindful while studying? This is a very important question for me since most of my time as a student is spent in studying.

Thank you very much.
I am not sure if this fits your tradition, but perhaps it might be a value addition to you or perhaps another reader. 

The best source to find out on how to be mindful is to get the information from the Maha Satipatthana Sutta. Here it mentioned that the awareness should be on the 4 foundations of mindfulness (these relate to the aggregates). In doing this you should pay particular attention to arising and passing of phenomena. You have to divide and dissect the foundation that you are looking at - e.g. if you look at body you should divide and dissect until you come to the level of Kalapa (sub atomic particles). You have to look piecing and penetratingly looking inside and out - e.g. if you take the body look at phenomena on the surface and also inside like in the organs. What ever part of the body or if you look at the whole body you should be sensitive to seeing phenomena arising and passing. You should try to actively or passively calm the fabrications. 

Now coming back to studying there will be a lot of mental activities. Some of this can be mental or verbal fabrications. You cannot avoid this. But any mental activity creates a sensation. You can keep looking at these sensations with out reaction. Pleasant sensation can be used to eradicate craving, stressful sensation to eradicate aversion and neutral sensations to eradicate delusion (see A Comprehensive Manual of Abhidhamma for the technicalities). Also try keeping your mind focused on the studying. If it goes to something else bring back your mind to the breath for a short while and continue studying keeping your thinking limited to studying. When taking a break whatever object your mind is on keep dividing and dissecting and look at it piercing and penetratingly. Also look at your breathing if you feel agitated or restless when studying for long hours. If you feel sleepy scan your body part by part staying on one place until you can feel something; if your body is already sensitive scan in rapid space. What ever the case keep your mind equanimous (devoid of craving and clinging) towards any sensation you experience.

Hope this is helpful. If you need anymore clarification please comment or post another question.