Even after doing this chapter, when I gave my class a homework assignment (what did you do for Chuseok?) they used the present tense in it, even though they knew the relevant forms of the past. To focus on the past tense I played a memory game.
It's like the "yesterday, I went to the market and I bought..." except you describe a day. So, teacher starts "yesterday I got up at 7am." Next person must repeat this and add a line (yesterday I got up at 7am and I had breakfast at 8am), next person must repeat these two and add a line, and so on. It gets hard really quickly. Works OK for big groups as you can randomly select people and as long as they are paying attention people of a very low level can participate, especially if you have just covered the past tense. You must be really insistent about correct use of the past tense or it's pointless.
It didn't really teach it or even practice it, just made them aware of the importance of using what they already knew.