Sam's+Journal

11/03/10 we are learning about time and temperature. i would like to learn more about converting farenheight to degrees celcius. today ive been learning about the time zones around the world. i found out that we are 13hrs ahead of england. A good entry Sam, although you need to make sure you date these please. We will be looking at converting next week. Mrs. Breeds.

12/03/10 We are learning about different time zones around the world and how to calculate time differences. If you have a look at a world map, you will see the lines going down the map. they are the time zones. greenwich is the middle country of all the others. all the countries to the left of Greenwich are slower than greenwich mean time, all the countries to the right of greenwich are before greenwich mean time. we are all the way over to the right so we are about 24 hours before countries all the way over the left. This is a good explanation Sam.

19/03/10 we are learning about the difference between Celcius and fahrenheit for temperature. to convert celcius, the formula is, C= (F-32) x5%9 heres an example: to convert 78 degrees fahrenheit to celcius, minus 32 from 78 to get 46. times 46 by 5 to get 230. divide 230 by 9 to get 25.55 degrees celcius. Great to see the formula and then the example.

23/03/10 WALT: we are learning to use algervraic working and thinking to solve decimal subtraction problems. yesterday and today i learnt a new way to solve these problems. the algebraic method is easy. example: 2.43 - 1.97= +.03 +.03 2.46 - 2 = 0.46

25/03/10 WALT: we are learning to use tempurature as a tool to help us with integer problems. Using tmpuratures for this is easier. example: -2+ +4= you have -2 degrees, and you add on +4 it =+2 +5- -14= you have +5degrees and then you take away -14 so the water gets hotter it equals +19. You certainly picked this strategy up quickly. It is a really useful one to keep in the back of your mind when you come to do the integer problems. TC

31/03/10 WALT: we are learning to make a decimal subtraction problem into an addition problem, to make it easier to work out. this strategy is pretty easy to pick up and easy to use. example: 3.18 - 1.87= to make this into an addition problem, the problem would look and sound like this: 1.87+__=3.18 1.8 + 3.1 = 4.9 0.07+0.08=.15 0.15+4.9= 5.05 if i got to choose to use this strategy or the other on where you add the same to both sides, i'd rather use the adding to both sides, just because i find subtraction decimal problems easier. What has happened to the problem solving and stats entries Sam? I thought that you had done these. If not I am expecting to see a large entry tomorrow.

3/05/10 Over the last 2 weeks we have been filling in the gaps in our knowledge. We were reviewing and learning new graphs such as: scatter plots, dot plots, stem and leaf graphs, histograms, back to back dot plots and back to back stem and leaf graphs. The new graphs I learnt was the back to back dotplot, histogram, back to back stem and leaf and scatter plot. Histograms show you continuous data. its like a coloumn graph without the gaps between the bars. Scatter plots show you 2 different types of data. one type of data goes up the y axis and another along the x axis, then you plot the dot right on where both information matches the thing you are graphing. Back to back dotplots show you 2 types of tests / pieces of data. such as, if you were testing 2 different types of rubber bands, You put one brand on top of the line and the other on the othe side. this information can be continuous or discrete. Back to back stem and leaf graph is the exact same as a normal stem and leaf but it shows you 2 types of data. such as hair length: you would put boys data on one side and girls on the other side. this can also be continuous or discrete. Well you certainly answered my challenge Sam. WELL DONE!!!

04/05/10 Today in maths, we looked at double bar graphs and statement results. The double bar graph we looked at, was only surveyed for one lunch time, which didn't give enough information. Also we learnt that every statement must be backed up by the data of the graph. Then we looked at a triple time series graph. This graph had along the bottom axis, monday, tuesday, wednesday, thursday, friday, saturday, sunday. then there were three keys. the keys had, recreational pool, hydroslide, lane pool. we had to make up our own statements about this graph which showed our understanding of trends. Remember to talk about the implications - that is the future thoughts about what might happen.

20/05/10 This week in maths, we have learnt how to draw up our own pie graph and how to make the data into a %age. I thought it would be harder than it was. also, this week we did a time series graph and a scatter plot on the same information. We had to write up some implication statements, as if we were writing it to the hospital. in doing this, i found out that a scatter plot and a time series graph are the same, except the time series graph shows continuous data and the scatter graph shows discrete. the only thing making the time series graph continuous is the lines connecting the dots. (: Kind of Sam. A scatter plot compares two sets of numerical data and a line graph can do this but plot other types of non-numerical data. Remember back to the fish when we plotted the weight and length - you couldn't do that on a line graph.

25/05/10 Yesterday in maths we just did some work on our stats investigation and mobiles. in that maths session, i collected all of my surveys, i finished mymethod and data. today in maths, im going to try and graph my information and come up with a title.

27 May 2010: Today in maths, we did another otago maths test. I got 3/5. I thought i would have got 4 but i made a mistake in my 4th question. The question said: use the numbers 1 to 9 in each of the 9 squares so that the arithmatic is correct in the coloumn going down and the three going across. For the first coloumn, i only remembered 6+2 and 5+3. i forgot 7+1. It is a very good score Sam and you should be proud of the progress that you are making with your problem solving skills. ok. thanks!

31.05.10 I need to practise trying to use at least 2 strategies to work out the answer, because i sometimes use a strategy thats probably not the best one to use. I need to improve on looking at the question and reading it to think of the best strategy and i also need to try and get a better score on my olympiad, otago and ikan. because the lowest score i've had was a 3 and the highest, a 4. Sam I have been really impressed with the effort that you have put into maths this year. You have some very good goals here and I think that your goal of a improing the number of strategies you are confident in using is a really good one.