Lv 31,032 points


Favorite Answers30%
  • Would like some comments about US primary education?

    I would like some one in the US who has good knowledge about US primary school education giving me some comments about the essential features and pros and cons. I am in Australia and we have some shared problems with UK and US English speaking culture but also some big differences. So I would like to point out a few main issues so some one in the US could contrast with US system and give me some description of what happen in the USA. I understand the USA is a huge country with huge population so generalisation is not possible. I will be happy with a view of large cities with very high performance such capital cities of most advanced states.

    Here are my questions with Aust figures/info as example

    - Do students have to repeat if they fail to pass a subject? (e.g. students do not have to repeat at all and would not be allowed to repeat even if parents want to)

    - How big is a population of a typical city primary school? (e.g. 350 - 500 students)

    - Do students have textbooks? (e.g. no textbooks, each teacher sets up his/her own program based on a general syllabus)

    - Does it have reasonable consistency? (e.g. no consistency, top student at one school can be near bottom of another in same city)

    - Does it have enrichment class for better students? (e.g. generally no enrichment, just put smarter students temporarily into higher class)

    - Does it have gifted programs? (e.g. in some states, really smart students sit difficult tests to enter special gifted classes which are located in some good schools)

    - Are private schools mostly religious ones? (e.g. yes)

    - Do expensive private schools select students very carefully and often accept only bright students? (e.g. yes)

    - Do Catholic schools form the second largest group after government schools? (e.g. yes)

    At high school level

    - What is a typical population for a high school?

    - Are there academically selective government schools? (e.g. competitive entry by sitting a very difficult test)

    - Are classes graded inside a high school? (e.g. yes, top students generally go to 1-2 classes from year 7-9 and the rest are mixed)

    - Do students repeat if they fail one or many subjects? (e.g. no repeat at all)

    4 AnswersOther - Education7 years ago
  • Trapezium and circle radius problem?

    Please help me with tips how to solve this problem in a quick way.

    A quadrilateral figure with the sides: 15, 15, 15 and 20 with 4 vertices on a circle. What is the radius of this circle?

    I could figure out that it is a trapezium with 4 vertices on a circle. I think one has to work out the diagonal for it and therefore has a triangle (with 3 sides known) with vertices on the circle. But I got stuck on how to find out the radius after this. Perhaps there is quicker way too as getting to a triangle is already a big job.

    1 AnswerHomework Help7 years ago
  • Pressure in a syringe problem?

    I revisited the science behind some simple machines to explain to my child but got stuck with some conflict between the nail, the syringe and the hydraulics. Could some one more knowledgeable help me to resolve a problem?

    Here are my understandings of these machines

    1/ The nail works by magnifying pressure. Imagine that I put 10kg force on a nail. The big end of the nail has an area of 10 square units (for argument sake) and the sharp end has an area of 1 unit. Then the pressure has been magnified from 1kg/square unit to 10kg/square unit. This assumes the whole force is transferred from the big end to the sharp end. This helps the nail to penetrate a hard surface.

    2/ The syringe should works same way? I put 10Kg force on one end with the piston (10 square unit for argument sake), so pressure is also 1kg/square unit and the sharp end will have pressure 10kg / 1 square unit. This assumes the force is fully transferred across.

    But the syringe is so similar (or same as the hydraulics system). If I use my knowledge of a hydraulic system to explain how the syringe works I get a contradiction. I put 10kg on the piston end, so the pressure in the liquid is 10kg/10 square units = 1kg/square unit. This pressure is transferred unchanged to the sharp end where the area is 1 square unit. The force comes out of this end will be 1kg/square unit x 1 square unit = 1kg. So I lost 9kg!

    So I have a contradiction. In one case I have the pressure of 10kg/square unit with using the nail as the analogy to explain the syringe. I get 1kg/square unit if I use hydraulics to explain it. I am aware that in hydraulics you use distance to trade for force to achieve magnification of the force. In the case of the nail, there is no distance trading at all.

    The syringe seems to work like hydraulics as you get distance change at the sharp end (longer liquid stream) but you also get higher pressure like the nail? Look at how the jet of water shooting out so far. I also relate to the idea how they use water with high pressure to cut metal and imagine this is how they magnify pressure. But in hydraulics, pressure is NOT magnified (just the force is magnified). In this case of a syringe, the force is reduced in trading for longer distance while the pressure stays the same.

    I cannot reconcile the issues. Can some one help?

    1 AnswerPhysics8 years ago
  • Help looking at this math question?

    I got this math question which I think has a wrong answer.

    A fly lands at random on one of the squares


    B X D


    Each of the 5 capital characters above represents 1 square.

    After the fly lands, it must walk to an adjacent square, either horizontally or vertically.

    What is the probability that the fly ends up on the square marked by X?

    From what I can see, the only way to get to X is to land on B or D otherwise it cannot walk to X either horizontally or vertically. So My answer is 2/5

    However the answer for this one is 4/15. I cannot figure this out. Perhaps this question is wrong.

    Please help to confirm this or give a solution that takes to the answer 4/15

    3 AnswersMathematics8 years ago
  • Please help with this math question?

    I cannot get to any of the numbers in the choices


    Each face of a solid cube is divided into four as indicated in the diagram.

    Picture is located here

    Starting from vertex P, paths can be travelled to vertex Q along connected line

    segments. If each movement along the path takes one closer to Q, the number of

    possible paths from P to Q is

    (A) 46 (B) 90 (C) 36 (D) 54 (E) 60

    1 AnswerMathematics8 years ago
  • Please help me to understand the lyrics of this old American traditional song better?

    I came across this song "On top of Old Smokey". I'd like to under better about the English literary devices and what they are or what they mean/represent.

    "Come out ye young maidens,

    And listen to me,

    Don't place your affection

    In an evergreen tree.

    For the leaves they will wither,

    And roots all will die,

    And you'll be forsaken,

    And never know why."

    An "evergreen tree" is technically a metaphor or it is a symbolism?

    In this song, what does an evergreen tree represent? It is a false-hearted lover or a young maiden?

    2 AnswersLyrics8 years ago
  • Help needed on the use of prepositions?

    The way prepositions are used must be memorised. I know that. But I am still bedeviled after 30 years living in an English speaking country. Could some one please help me with the use of in, on and at in the following situation.

    He scores 70% in the English tests.

    He scores 70% on the English tests.

    He scores 70% at the English tests.

    How are these sentences different in meaning?

    Any recommendation on how to use prepositions better would be much appreciated. I am sick of stupid online English native speakers who could not speak a sentence of a foreign language picking on me about prepositions. This is the kind of things you must learn since you are little kids or you will forever have problems. Microsoft spelling and grammar checker shows no error at all. I suppose it knows no better.

    1 AnswerLanguages9 years ago
  • Help needed with a combination problem?

    I found this problem but cannot solve properly, please help

    A number made of 4 digits (eg: 0529) is picked from 4 rows of numbers





    Only 1 digit is picked from each of the row to make this 4 digits number. How many such numbers are possible using this rule?

    The answer is 648. I cannot find a way to prove that this answer is right or wrong.

    1 AnswerMathematics9 years ago
  • How to get outstanding in English?

    To the experts out there, please give me some ideas. My daughter did not speak English when she started school. She has done very well. She is now in one of the top schools in the country at grade 7. However her non-English background may have held her back a little and she failed to achieve outstanding grade for her English. This is partly because she is also a bit shy so the communication area is softer than the other areas (all in English). The teacher mentioned that she could improved further by having a program of English learning at home. Does this mean something like kids who go to coaching have to do? I could ask the teacher after 3 weeks break but that's a long wait.

    My daughter has never been coached or formally enriched in English. In theory she has a lot of room to improve but if an attempt to reach outstanding grade will require a tutor and/or a lot of work in a heavy and disciplined program, it may not be worth it. I would just ask her to wait and see until she gets to a higher grade like 9-10. Alternatively she could cut back on her outstanding performance in other areas to channel more energy into English (which is supposed to be more important). It would be NICE for her to have outstanding grade for English but it is definitely not a priority at this moment.

    3 AnswersPrimary & Secondary Education10 years ago
  • English test past papers for primary school level from the UK?

    Hello every one. I would like to get hold of some past English test papers grade 3-7 from the UK. Any one knows where I can get these? I know the US State Dept of Education releases past papers and I have found them. I would like to get the past UK papers.

    2 AnswersStandards & Testing10 years ago
  • Past tense in complex English sentence problem?

    I have a problem with English grammar regarding past tense for complex sentence. Very long ago, my English teacher taught me that the tense must be consistent in a sentence. If a complex sentence has a clause in past tense, the rest should also be in past tense (one of the past tenses). I wonder if thsi is true. Please look at this example I pick from a news article and please give me some ideas if this is right or wrong.

    "Britain's Daily Telegraph disclosed in June that senior space agency scientists believed the Earth would be hit with unprecedented levels of magnetic energy from solar flares after the sun WOKE from a deep slumber about 2013."

    My trouble is the word WOKE which followed the past tense rule I was taught. But as this event will likely happen in the future, should the writer use present tense "WAKE" instead?

    My question is really about whether my teacher was right, and if this is true across the whole English speaking world. My child from school started to argue with me that teachers at her school did not accept this grammar style.

    5 AnswersLanguages1 decade ago
  • Taking a penalty kick in soccer?

    Can you run to the ball, pretend to kick with one leg to fool the goalie to jump, see where he is going then kick the other way? I suppose this is not allow as you would always get the ball in the net.

    1 AnswerOther - Soccer1 decade ago
  • Audition for The Conservatorium High School, any tips?

    My kid would like to enter the Conservatorium High School in Sydney. It is a HS with music speciality in the past. However there seems to be a new academic focus right now. That means it will only take kids who are both academically gifted and musically gifted. My kid seems to be musically gifted but we only thought anout music as "for pleasure". Therefore we never asked the child to invest energy into music with the intention to become a musician. We never asked our child to learn 2 instruments or dwell into difficult music theory levels. Now we would like to our child to apply to enter this HS at grade 7. We have no idea of their expectations about musical skills of kids at age 11. Any one could enlighten us?

    6 AnswersPerforming Arts1 decade ago
  • Modern sloppy use of English?

    I am from non-English speaking background. I am just so puzzled by cases where native English speaking people with high education and reporters cannot agree on simple basic English usage. I wonder how this comes about and wether this is sloppy modern English or it has always been the case for centuries.


    Case1: X has 3 dollars. Y has 1 dollars. How many times more money does X has than Y.

    Some people insist that X has 3 times more money than Y. (3/1 = 3)

    Some people insist that X has 2 times more money than Y. (3 -1) / 1 = 2

    Case 2: The new device is 80% smaller than the previous model.

    Some people insist that the new device is at 80% of the size of the previous model.

    Some people insist that the new device is at 20% of the size of the previous model.

    It's not too surprising that people disagree. But I am completely astounded that after carefully analysis and applying mathematics to each analysis, people who had chosen one intepretation keep insisting that they are right (and state that the other intepretation must be wrong). I have hardly encountered a case where one admitted that s/he might have got it wrong.

    If educated adults with degrees and even PhDs cannot agree on these basic concepts for young kids, how could they agree on anything at all?

    Obviously the above examples could be re-worded to clear up all the ambiguity questions could be

    Any light on this? Perhaps a qualified person in English usage of the old school may be able to comment?

    5 AnswersLanguages1 decade ago
  • Size comparison - Mathematical english question.?

    The careless way that modern people use English really get me confused. Please help me to understand exactly what people mean in the following comparisons.

    1/ Anna has 4 times more money than John has.

    Does this mean that Anna has 5 times as much money as John has? Or it only means Anna has 4 times as much money as John has?

    I know it's a logical problem here. If it is understood the second way, then if Anna has the same money as John has, you would say Anna has 1 time more money than John has. And that's wrong. But people seem to ignore or not even aware of this logical problem.

    2/ The new cable is 10 times smaller than the old cable.

    Do they mean that the new cable is 1/10 of the old cable? I see a logical problem again.

    In many other languages, people do NOT say it like this. They say precisely "The new cable is 1/10 of the size of the old cable". Why do they no longer use precise wording in English like in the old time?

    The wording "smaller than" or "greater than" is really about the difference in amount. They are really inappropriate for multiple and factor.

    3/ The new disk drive is 70% smaller than the old one.

    Geez. This is hard. Do they mean that if we consider the old one as 100%, then the new one is 70% of that? It would be quite bizarre if they mean the new disk is 30% of the size of the old disk! I have no idea.

    1 AnswerMathematics1 decade ago
  • Logic problem in daily language?

    I find logic in daily use of English could be so vague. And that's probably why the learning of predicate logic is so tough for young kids and even adults. Can some one comment on this daily use of English?

    "Sam doesn't want Nick or Joe to come to his place"


    "Sam doesn't want Nick and Joe to come to his place"

    The two statements are different but they seem to mean the same thing in common daily use of language. The logic of the two statements are clearly different. But who would be able to comprehend the difference unless a vigorous verification process is applied truth tables or logic rules?

    I see that people have to re-ask questions 1 or 2 times before they get the answer the way. Some adverbial phases must be added to clarify the meaning. It looks like in natural language and the (careless) way we often use it, our daily language looks like the illogical babbling.

    1 AnswerLanguages1 decade ago
  • Comprehension flaw in modern kids?

    I find it so interesting that modern kids and even adults are stumped by this grade 1-2 question. I'd like highschool kids and adults try this simple question. Don't over beat it by spending too much time on it. Give yourself under 60 seconds only and tell me the answer that comes straight into your mind.


    Anne has $12. Rachel has $4. How many times more money does Anne have than Rachel?


    Don't be surprised if you get it wrong (:

    4 AnswersStandards & Testing1 decade ago
  • Which phrase is right?

    I want to say "2 men out of the total of 3 men". There are two ways to say it

    a/ 2 out of 3 men

    b/ 2 of 3 men

    From what I know, the first way is right. It's also taught in maths books. In maths books, when people say "2 of 3" they mean 6, not 2/3

    How ever when I search Google for the phrases, "2 of 3men" has vastly higher number of hits than "2 out of 3 men". That means when people write news on online newspaper and post stuff on the Internet, they actually use more of "2 of 3 men" to mean 2/3!

    Is it true now that the correct way to say this is now considered the wrong way to say it? Or they now think both ways are the same. This leaves maths a complete exception where each phrase has a different meaning.

    8 AnswersWords & Wordplay1 decade ago
  • Word problem - How much faster?

    Please help me to confirm my understanding of a word problem.

    Anna walks to school in 20 minutes. Anna can cycle to the school in 5 minutes. How much faster can Anna cycle than walk?

    I have problem about the English here. I cannot be 100% sure what the question wants student to answer.

    1/ The first way to understand is that 20/5 = 4. The time taken to walk is 4 times the time taken to cycle. Therefore cycling is 4 times faster than walking.

    2/ Another way to under stand is to look for the difference in time. 20 - 5 = 15 minnutes. Walking is 15 minute slower. So cycling is 15 minutes faster. Therefore 15 / 5 = 3. The answer is that Anna cycles 3 times faster than walks.

    Which way of thinking makes better better sense for this question?

    5 AnswersWords & Wordplay1 decade ago
  • How to write time properly?

    Is it improper to write half past 12 as 12.30pm? Should it be 12:30pm?

    Does "1.30 hours" mean 1 hour and 30 minutes or 1 hour and 30% of an hour (which is 1 hour and 18 minutes)

    Does "1.24min" mean 1 minute and 24 seconds or 1 minute and 24% of a minute (which is 1 minute and 14 seconds and 40% of a second)?

    2 AnswersStandards & Testing1 decade ago