During my engineering study, I combined theoretical concept and, calculation and hands-on experience to deeper my understanding. For example, after studying about design of concrete structures for almost an entire semester, I casted a beam for real in a group of three. I needed to prepare a model for that beam, and combine it with reinforcement bars made by my teammate. Design of the beam was done in groups,; we shared our ideas and cross -checked each other’s work. After finishing the design with my teammates, I cut plastic boards into small pieces and glued them together. In order to make this model leak-proof, the cutting section needed to be as straight and flat as possible, and vertical to all nearby surface everywheres. Thoise was achieved with extreme careful. Control points were set every three inches, and there iwas no deflection from point to point, and the width of beam iwas exactly the same at each check point. Glue was also used to seal joints to avoid any irregularity caused by tapes. The beam was casted in the lab with reinforcement prepared by my teammates. SThe strength of beam was tested after enough curing. It is actually very close to the calculated value.