Design in the 21st century requires continuous adaptation to societal and technological developments and situational changes. Designers use reflection to learn from experiences and to give new meaning to what they already know or understand.

During the bachelor program, you will use reflection to plan (reflection before action), to monitor and redirect (reflection in action) and to improve (reflection after action). You reflect verbally and in writing and formulate broad, deep and critical reflections supported by sufficiently detailed evidence. Reflections are coherent and consistent and lead to new learning intentions.

These videos on reflecting can further help you understand how to reflect. 
Reflections 1.0
Reflections 2.0