Elaina's+Journal

​12/03/10 Journal W.A.L.T. We are learning about different time zones around the world and how to calculate time differences. Today I learnt how to work out the flight times by using the world clock and the depature and arrival times of flights e.g. to figure out the flight time to Bangkok from Auckland you find out what the depature time would be in Bangkok. The depature time in Bangkok would be 0730 because they are seven hours behind us. The arrival time in Bangkok is 2230 so the flight time would be 15 hours long. I found this maths easy because I found a good way to solve the problem and I love working with time. This is a good explanation Elaina. In your next journal entry, can you please explain why we have time zones and how these are worked out. Mrs. Breeds.

15/03/10 Journal W.A.L.T. We are learning about different time zones around the world and how to calculate time differences. the times in the world are all calculated by the Greenich Mean Time. The Greenich Mean time is a time that can't be altered by the weather or the spin of the earth. We have 24 time zones in the world and in the middle time zone is the greenich mean time. All time zones on the left of the GMT are behind the GMT and all time zones on the right of the GMT are in front. how the time zones work is by the sun, the moon and the tilt and spin on of the earth. The earth takes 24 hours and 1/4 of a minute to do a full rotation so the sun and moon are in different places at different times. So if the sun was shining on New Zealand the moon would be showing in England. So that means we are 12 hours infront of england and the GMT. This is why we have Time zones and how they work. A huge improvement Elaina!

17/03/10 Journal W.A.L.T. We are learning about exchange rates for currency. Today we learnt about the currency exchange rate. How it works is every new Zealand dollar you have it may intital to 70 cents american e.g. if the exchange rate for the american dollar is .7044 and you had 100 dollars New zealand and you want american dollars you go 100 times .7044 and what ever the answer is, that is the amount of american money you get. If you come back from america and you have 25 american dollars left and you want to convert it back to new zealand dollars you go 25 dived by .7044 or the exchange rate at the time and you get whaterever amount of new zealand dollars that equals. And that's how it works for all of the currincies. They exchange rates currencies changes through out the day so it's never the some amount for a long period of time. I found this maths fun and interesting because I've just recently been to america and we had to have a high exchange rate to get good money. I also found it easy once I got the hang of it. A fantastic entry Elaina - very clear explanation.

19/03/10 Journal

W.A.L.T. We are learning about the difference between celsius and fahrenhiet fo temprerature. We have been learnig about Fahrenheit and Celsius and how to convert them. To figure out how to convert from Fahrenheit to celsius you go F#- 32, :/: 9 times 5= C# e.g 73-32 divided by 9 and times by 5 = 23. And the other way round to convert from celsius to farenheit, C# Times 9, DIVIDE BY 5 AND ADD 32.. We have 2 different measurements because we firtsly started out with Fahrenheit to measure tempreature and then most of the world started using celsius to measure tempreature apart from the U.S.A and a few other countries. Another detailed entry with clear explanations.

23/03/10 Journal W.A.L.T. use algerbraic working and thinking to solve decimal subtraction problems. We have been learning about a algerbraic way to solve a decimal subtraction problem. The way I would use this is I would make the number you are subtracing with a whole number e.g. 5.94 - 4.75=, 4.75+ .25=5, 5.94+.25=6.19, 6,19-5=1.19. Also whatever you add to one number in the eqaution you have to add to the other number in the equation. How and when I would use it would be when I am counting how much money I spent when I go out shopping. I think I would deffentily use this strategy formy decimal subtraction equations because it is easy and fast and you wouldn't need pen or paper. ​ Thanks for your honest and open reflection. It is a good strategy to use and what better way to use than when you are shopping. TC

25/03/10 Journal W.A.L.T use tempreature as a tool to help us solve interger problems. Today we learnt how tempreature can help us solve interger problems. How this works is if, for example, you have a pool and its temp. is +7 and you take away -5 the answer you get is positive twelve, +7- -5=+12. I find this strategy very useful, quick, easy and fun and i would definetly use this strategy to solve interger problems becuase I fell confident about using it. This learning will help me in trying to work out tempratures and will be a good starategy for working out intergers. ​I am glad you feel confident using this strategy. It is definately a good way to help you remember whether to add or subtract w hen working with integers. TC

19/04/10 W.A.L.T. find out and use different problem solving strategies. Today I learnt a couple of new problem solving strategies e.g. logical reasoning, look for a pattern ect. I found using some new strategies interesting and a bit of a challenge because I haven't put some strats. to practice. My goal for the next few weeks with problem solving is using some new and different strategies to work out problems. I was also amazed at how many different problemsolving strateies there are! That is great Elaina. It does practice for you to become confident and familiar with using these strategies. It is also important to be able to choose what strategy is the smartest to use for which problem.

26/04/10 W.A.L.T. Use and learn different graphs. Last week I learnt how to do a scatterplot graph. A scatterplot graph uses discrete data and can show data from 2 different variables e.g. the hieght and weight of a dog. I also learnt what graphs a good for different types of data e.g. time series graph is good for continuos data where as a collum graph is good for discrete data. Last week I also learnt how to do a Back-back/ dot plot.A dot plot shows discreet data and can only show one variable. I also learnt that choosing a good problem solving srartegy for a problem can be difficult. Also that there are 4 different bar graphs. This week I learnt what and how to do a histagram. A histagram shows continuos data and is a type of bar graph e.g. it could show the hieght of a flower. I also recapped on what a strip graph was. I think that I have filled some gaps with my statistics and problem solving strategies and what I've learnt will help with my learning. Great entry Elaina. I am glad that we have been able to fill those gaps for you. SO do you think you are confident in deciding what is discrete and what is continuous data? Yes I am confident in deciding what discrete data and continuos data is.

4/05/10 W.A.L.T. Interprate and make statements for data. Yesterday I learnt how to interpret,collect and make statements for data on digistore e.g. you chose questions for a survey, make a graph and make statements for a graph containing the data to show we understand it. Today I learnt the same walt by making statements for double bar graph and a time series graph and then making recomendations for people using the graphs data. An example of this is if a graph shows 20 boys and 30 girls buy coke you could say as a statement that more girls by coke than boys. I fell confident that I can make true statements for graphs and that I can interprate data to make true statements. This learning will help me with my statistical investigation because last year I struggeled to make statements for my graphs and will also help me in further investigations. Great to see these activities are assisting you with that goal.

6/05/10 W.A.L.T. What is,how to make and display a box and whisker graph. Yesterday I learnt what a box and whisker graph is. I learnt that this graph shows a median, upper quartile, a lower quartile, a maximum and a minimum. I also learnt that the school sometimes shows our test results on a box and whisker graph sometimes. Yesterday by doing the box and whisker graph I also learnt what a quartile is. The lower quartile shows the 25% of data less than the 50% value and the same for the upper quartile except it shows the data higher than the 50% value. I feel confident that I can do and use a box and whisker graph and I know what quartiles are. This learning will help me understand my test results better. It is a great type of graph for showing large amounts of data and the outliers that exsist.

14/05/10 W.A.L.T. Use a protracter to create a pie graph. Today I learnt how to make a pie graph using a protracter. What you do is you tally up the total of the data you have gathered. Thenyou divide the total with 360 (because there is 360 degres in a full circle). After that you times all the data e.g. 10 people said yellow, by the the answer you got when you divided 360. When you get those answers, they are now used as degrees on a protracte. you then draw up the pie graph using the protracter to get the correct amount by using degrees. I feel confident that I can make a pie graph using a protracter. I found this learning easy because I understand degrees.

20/05/10 W.A.L.T. Use excell to create a graph. Today I recapped on how to use excel to make a graph. How you do it is you type in your data and then highlight it. then you select the graph on the toolbar. Next you select what type of graph you want to use, then you type in the title, and axis title, and then you are finished. I feel comfortable about using excel because I learnt how to use it last year and I use it all the time. Yesterday I also did my Olympiad math test. I got 2 out of 5 and I feel okay about my results. I would like to see at least a 3/5 Elaina. Remember to use those strategies we looked at and use another type of strategy to check your answer.

16/06/10

W.A.L.T Convert mixed numbers to improper fractions, vis versa so we can add, subtract, multiply and divide fractions

Today I recapped on how to add fractions and I learnt how to change a mixed number into a impropper fraction, vise versa. How ​