Swimming unit

When I first started the swimming unit I didn't know butterfly and was very weak in back stroke and freestyle. I was expecting to improve in both back stroke and freestyle. I feel like I improved in all strokes a lot but mostly in freestyle, I learned more techniques involving hands that mostly helped me in freestyle. I got more confident in the water and I'm able to swim a lot more then I was able before. I didn't like the games in the water because I felt like i'm not improving my swimming skills, I prefer swimming laps because it's physically challenging and I feel like I'm improving.