October 2013 archive

Math games Activity

On October 15th, we went to the auditorium to do the 8th graders’ casino games for period 1 and 2. First we had 15 tokens to play the game. Our purpose was to do the games and see which class had the most tokens left after the games. It will be counted by the average number for the tokens each person has. There were 20~25 games. Each games had different rules, and the amount of tokens you pay and you get were all different. Some were easy to win, some were hard to win.

↑This is how the auditorium looked. As you can see, it was very crowded because there were lots of games and there were two grades. 6th grade and 7th grade.

↑This game was quite crowded because the possibility of winning was about 75%. The rule for this game was you pick a card from the pile and if you get a red card, you were able to roll the dice and there was a list for how many tokens you get to get with the number of dice. The list was:

5,6,7,8,9- 1 token

4,10- 2 tokens

3,11- 3 tokens

2,12- 4 tokens.

Most of the games used cards and dices, but there were some games that didn’t.


←This game used marbles

←This game used candies

←This game used pictures of toy ducks


There were rules on each table so each person can read the rules and decide if they want to play the game or not before they spend their tokens.

The games I played was the one you pick a card from a pile and pick the red card and roll the dice; picking the red marble; picking the red candy.

I thought some games were fair and some were not. The one which you pick the red car and roll the dice was fair because the possibility of getting at least 1 token was quite high. However picking the red marble one and picking the red candy wasn’t that fair because I think there were only 1 or 2 red marbles in the bag, and only about 3 or 4 red candies in the box. I made a profit for the red card one and the candy one. I did the red card one a few times and I mostly made a profit because the possibility of making a profit is quite high. When I did the candy game I think it was a miracle because when I saw the other people doing the game, most of the people lost. Also as I said above, there were more yellow, blue, green etc… candies more than the red candies. I did the marble one twice but I lost both times. I think I lost this because like the candy game, there were more blue marbles than the red marbles.

I learnt that when you spend your tokens, you need to check the rules and find out the ratio of making a profit and loosing otherwise, you will throw away all of your tokens.

How does field studies relate with our significant concept?

Our Significant Concept is “Living and working and community creates opportunities and challenges”. We went to field studies, and our question was how does our significant concept relate with field studies.

I think, our significant concept relates to field studies because, when we say living, we don’t live with our room mates for a long time, but we stay in the same room, and sleep together for 5 days. Also, we share our stuff with all the people which stay in the same building. For example, the bath, the cafeteria and the bathroom. Also, for the activities, we broke into small groups, and worked together. When we were working, we shared ideas, waited for each other when we were hiking, helped each other’s problems etc… 

The first day we became in our groups, I think most of us didn’t know each other compared to the last day we worked together. Some people never talked to one, or two people in their groups. Also, we had some opportunities and challenges during the field studies. One of the opportunities was to play games with the teachers. After the activities, or the times between each activity, we played UNO with the teachers. This can help know more about teachers, and more about your classmates. Also, we had an opportunity to help the Matsumoto area, by painting the stage they use, and cover the old colour, so it will look new.

The challenges for me was to use English more because since I’m Japanese and I always hang out with my Japanese friends at school, I don’t use English at snack time or lunch time. However, at field studies, there was at least 1 teacher or staff at our table and they can’t speak Japanese, so we needed to try our best to use English.


Our experiment was to find the percentage of salt and iron from the loromite which is a rock. However, loromite isn’t made with only salt and iron. There are cement and other stuff in it too.

These are the equpiments you need:

filtering paper, bunsen burner, beaker, water, pestle, calculator, balance, rock, tripod, heat proof mat, scrap paper

Our method was this:

1. First smash the rock with the hammer. Then with the pestle.

2. Then measure the mass by putting it on the scale.

3. Put the rock in the beaker that has water in it.

4. Mix it so the salt will dissolve.

5. Next, filter the liquid inside the beaker little by little. Make sure the liquid will go into the flask which you set.

6. Then, evaporate the water that was filtered by using the bunsen burner. At this point, put the liquid in the beaker, not the flask.

7. Measure the mass of the salt and iron.

8. Find out the percentage by salt=mass of salt/mass of the rock x100; iron=mass of iron/mass of the rock x100.

9. Write down the result and other information on your blog or somewhere you can present them.

The result was

The mass of the loromite: 26g

The mass of iron: 11g

Cement: 10g

Salt: 5g

Percentage of iron= 42%

Percentage of salt= 19%

I think there were quite a lot of errors during our experiment. The first one was that when we were filtering, we couldn’t filter all of the liquid because the cement and iron was stopping some liquid. The second error was that when we were measuring the mass of salt and iron, some iron were stuck on the filtering paper, and as I said above, some liquid wasn’t filtered so we couldn’t weigh the perfect amount of salt since the liquid will be the salt when it evaporates. The third error was that when we were smashing the loromite, the loromite scattered in various places. There were more errors but these were the three main errors.

I think we did okay for our experiment but I think we can improve our experiment by having less errors by overcoming our errors. However, I enjoyed the experiment and next time I would like to have the mass more accurate.