# kw0573

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1. ## Moving to a public Canadian school after finishing only one year of IB? Is it possible?

In Canada, the curriculum depends on the province. It is likely that you will enter as a grade 11, mostly because you will not have Canadian history or other social sciences requirements. There may be also standard testing you need to pass, in some provinces. I am not sure, but you can try write to the ministry of education in the province via email and they may be able to give you a better assessment.
2. ## Is my math Sl IA idea good enough?

Making the IA more complex is a good idea, until you can't handle it. When applying the volume of revolution formula, the integral has to be integrable, you have limited exposure to integrals in SL, so do not choose super difficult functions. I just think numerical integration is somewhat lacking and relinquishes the opportunity to showcase integration skills. Polynomials are the best. You may have to break up the domain and/or range so you have functions, not other relations, to describe the vase outline. The other major difficulty in this topic is making the function(s) used to scale. Basically you need a 1 to 1 scale outline to lay over a grid and there may be many ways to do that. You can use this applet https://automeris.io/WebPlotDigitizer/ to identify points on the grid and find equations that fit them. When you apply regression to find the equation(s), it's best to explain how and why the regression formula works.
3. ## Is my math Sl IA idea good enough?

The topic is ok and has the potential to score well (15+). Be sure to explain your steps carefully, especially as to how to verify the the equations used to describe the vase and how to verify the integral experimentally. I would suggest picking a smooth vase (without much grooves) and it may be even possible to figure out the average thickness.
4. ## What supplies will be needed for my classes?

Consider familiarize yourself with the official IB guides on all your classes and EE/TOK/CAS. We have the most recent ones in our Files section/General IB Downloads/IB Syllabus and Data Booklets. We have all of them except for the Math Analysis and Approaches one, but it is close to current HL(2014 edition, last modification 2016)
5. ## I regret my choice of subjects

If your grades are good and you have good extracurriculars (and maybe portfolio?), then you have nothing to be worried about. Don't underestimate ESS or Art HL as most people get 5s or below in them. The only downside is that if you were to study sciences or social sciences instead then these courses would not be competitive or even meet pre-requistes in the most competitive schools.
6. ## Chem HL Help

Have you looked at youtube videos by MSJChem (Mike Sugiyama Jones), Richard Thornley, or Andrew Weng? They follow the IB syllabus and provide videos for quick review. So the main idea is that ligands can split the transition metal's 5 degenerate (same-energy) valence d orbitals into different energies, depending on the transition metal ion, geometry of the complex and the specific ligand(s). In weak field ligands, the resulting d orbitals are still close in energy (small bandgap), such that they remain essentially degenerate. In strong field ligands, the activation energy to go from lower d orbitals to higher d orbitals are large enough such that electrons fill the lower d orbitals first before the higher ones. In the common octahedral geometry (ML6), the splitting results in 2 d orbitals higher in energy than the other 3. Other complexes have different splitting patterns. The colour of the complex depends on the light that is most absorbed. This energy will partially excite an electron from a lower d orbital to a higher one and partially goes to thermal energy. The equation E = hν relates the photon energy E to the frequency of the peak absorbance light v, or E = hc/λ, with c the speed of light and λ the wavelength. The colour of the complex is then the light that passes through (or get transmitted), which is determined using the colour wheel. So if using E = hv you calculate 700 nm (v = 4.3× 10^17 Hz) or red light, then the complex colour is green because red gets absorbed so green passes through.
7. ## Should I take English lang/lit or lit?

Scientific writing is not all that similar to what you learn in Lang/Lit or Literature classes. With that said, certainly Lang/Lit is the better option. Consider the option to do Lang/Lit HL and university transfer credits are usually awarded if you score a 5 or 6. If you are concerned with lack of practice, you can practice an analysis piece from a play/poem you are reading once 2-3 weeks (in a 2-hour sitting each time), or by incorporating similar writing into your CAS reflections, which you have to write anyways. You can expand your reading materials to include (modern) poetry so you can understand/analyze them relatively easier than Shakespeare.
8. ## Subject Selection

From what I looked up, history is not a pre-requiste. B/M vs ESS does not really matter. She should take the one with a historically higher average at the school, rather than Internet discussions of whichever one is "easier". This course combination is good for undergraduate law.

10. ## new maths syllabus

If you are not applying to a top university in architecture then AA SL is completely fine.
11. ## new maths syllabus

The most competitive schools require Analysis and Approaches HL (eg Cambridge). Otherwise I believe both HL courses are strong preparations.
12. ## Physics IB help

In the most common model of friction in springs, the spring constant does not change when friction changes. It is much analogous to the way mass does not change when coefficient of friction changes. Frictional force is just an additional force, to the elastic force. With that said, I strongly recommend that you slightly change your KQ to be more physically accurate.
13. ## TOK presentation knowledge question

In general, the ethics in TOK are about "how ethical standards are established" not "how to apply ethics to this situation". It's very much when you talk bout experimental sciences in TOK that you talk about "how the scientific facts are established" and not "how to apply science to explain this phenomenon". I would cautious against emphasizing on ethics in the main KQ, but as long as you follow the above rule it's fine. Consider explore more about how Elizabeth Holmes deceived investors and include discussions of heuristics, logical fallacy (appeal to authority?), emotion, reasoning, language and possibly faith. A downside of this real life situation that you need to more time than usual to establish the facts of the case: did Holmes know she deceived investors? How well/accurate did the apparatus work? Was she aware of the legal consequences of fraud? Who are the scientists on the company? Did they realize this was a fraud? Finally, the Stanford prisoners' experiment is one of the foundational and cliched examples of questionable ethics in science. Ideally you should find an example where facts are easy to establish/explain, but definitely more recent.
14. ## List of IB failing/passing conditions

This topic is now locked. Please click on the "recommended post" for the current list of failing and passing conditions.
15. ## How many WTs do we have to submit at SL?

That is correct: you need to produce at least three WT and submit one to the IB. You need at least one from each of language and literature. Once your teacher grades/reads them, you will submit the highest graded one. For questions regarding IB assessment requirements, see the relevant IB guide from https://www.ibsurvival.com/files/category/14-ib-syllabus-data-booklets/. However you are using the new Class of 2020 guide, as the course has just been updated. A web synopsis is available here: https://www.thinkib.net/englishalanglit/page/2536/written-tasks.
16. ## Is my Math SL IA idea sufficient?

Do you mean standing waves or resonance? I suggest not to venture into physics if you are not strong in physics. (The math of resonance is beyond Math HL). I don't usually like to recommend modelling because i) it is hard to verify your results ii) the math is usually not very complex iii) a lot of number crunching that is prone to errors iv) it is difficult to communicate the ideas systematically. A different route is to explore relationships between topics, usually through solving a problem. For this route it is usually easier to verify the result either because you can plug into an online calculator or find other people solving similar problems. For this route I recommend looking through videos by 3Blue1Brown and Mathologer for inspirations. For modelling, I strongly recommend exploring/deriving the formulae for linear regression before using it. It is usually better to "calculate" parameters rather than through trial and error. One approach is to linearize the equation to be fitted, apply linear regression (such that the slope and y-intercept are expressions of the original parameters), then solve for the parameters. You can see how complex modelling gets if you do it rigorously. Ideally, it should be a mathematically elegant topic that you understand well and can explain clearly.
17. ## Best Highschool- Uni level maths practise or textbook???

When I was taking Math HL in May 2015 exams, we used IB questions from last 12 years and perhaps 3 textbooks (they were photocopied so hard to tell). I think they were just old editions of oxford, cambridge and haese. Math HL is certainly difficult but you don't need questions from obscure sources to score well. It is impossible to foresee the last 2-3 IB questions on each paper. Here are some other suggestions 1a. Go over the math syllabus. Double check that you know very well how to apply the concepts covered. Some topics that some schools might gloss over is the solution to system of 3-variable linear equations (including 4 trivial cases and 3 non-trivial cases). 1b. Look for some subject reports from recent years. Not enough teachers and students read them; the documents include examiners' feedback on areas students should work on. Make sure you spend extra time on such topics. 2. Practice simple questions before going for hard ones. IB questions are used to assess your comprehension, not to strength it. Practice repetitive problems before IB ones. 3. Set reasonable goals. If you have not shined in pre-IB math, it may not be the best use of time to aim for a 7. 6/7/7 in HL is usually a very very strong result and you don't have to have a 7 in math to do that. 4. Practice pre-IB topics such that you can solve them fast and efficiently (eg 96%+ in 20s or less). These may include factoring quadratics (and sum/difference of cubes), solving system of linear equations, simplifying radicals, finding prime factorization, simplifying fractions, FOIL (expanding product of binomials), solving linear inequalities. There is simply no time on the exams to mess up on the simply things.
18. ## Is my Math SL IA idea sufficient?

The topic in its current form is very much insufficient for a SL Math IA. You should look for math topics that go beyond a simple formula.
19. ## Math HL IA Queue Theory

There are different models in queue theory. You should state your assumptions in your chosen model for the particular traffic and justify/evaluate the model throughout the IA. You should definitely go beyond stating a model without making attempts to justify it.

I meant to pick a topic beyond SL/HL, such as a phenomenon or a concept. Examples may include aerodynamics, fluid dynamics, heat conduction/convection.

Young's experiment is way too simple, as it is an SL topic. Consider exploring a topic where the physics cannot be described by a simple well-known formula. Or start from topics that are not discussed or not discussed thoroughly in the syllabus. For university admissions, many have their past entry physics exams posted online. So a good start is to look through those.
22. ## Failing CAS

Please stop referring to CAS "hours". The expectations for almost a decade have been maintaining evidences and reflections (including non-written forms) for all CAS activities, collectively spanning over 18 months, while meeting all the learning outcomes. There is no official fail in any IB course in year 1. Please defer to the coordinator if your school has additional requirements to "pass" CAS in year 1. Because of how much harder year 2 is, you should aim to have about 70% of reflections and other formal requirements done before year 2.
23. ## Math IA about multiple dimensions

Ultimately, the problem may be doable if you can solve the original wgc problem using matrices. If you cannot even solve the 3d version using matrices then there's no point solving a 6d problem. The only other attempt I would try is to turn the 6d problem into a 3d or a 2d problem. This StackOverflow post illustrates some of the 2D ways and matrix method to solve the wgc problem. Personally I thought the matrix solution was way too convoluted and rather require some great familiarity with matrices (that I do not possess despite taking 1.5 university courses on linear algebra). Also consider solving the same problem multiple ways and compare the different approaches. IAs that "solve a problem" usually score better than ones that just "explore a concept", because the former has better focus.
24. ## Two extra HL's?

That's technically true, although most students work or pursue post-secondary studies immediately so it is rare to take a Candidate course after Diploma. You can write in only 3 exam sessions (max), so it's perfectly fine to register for one session for your Diploma, then a later session as a Candidate. The much more popular option is to take a 7th subject concurrently with your Diploma courses. Another option is that if they offer summer or night school in Sweden then you can take a course in physics as opposed to waiting after you get the diploma. Email your coordinator if you can still sign up for chemistry, if that's what you really wanted. From a practical perspective, Visual Art SL is usually neither easy nor useful.
25. ## New math course prep help?

Practicing past papers is really not the best the preparation for Applications/Interpretation SL or any IB course. There is simply no time to learn everything in A/I SL in few weeks. The best is to make sure you know everything well you learnt up to now. For example there are grade 8-10 exercises at KhanAcademy and you should make sure you can do them without a calculator with high accuracy. Some essential skills include working with fractions and decimals and negatives, simplifying fractions, finding prime factorization, simplifying radicals, expanding product of two binomials, factoring a quadratic, solving linear equalities, solving system of 2 linear equations by substitution and by elimination. In general for all of your IB subjects, make you sure know how IB and your school's assessments work and weighted. We have the official IB guides here.
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