Posted in Pure Physics

Sec 4 Physics Reflections 27/01/13 – Applications of Electrostatics

I wanted to proceed to Current Electricity, but the students wanted more discussion on how to answer application questions on electrostatics.

So I supplied them with quite a number of such application questions, often with confusing diagrams. The key to answering such questions is to first draw the distribution of charges on the items in the diagram, and identify which objects are conductors and which are non-conductors. For the conductors, check whether they are insulated from the surroundings.

Key points to note:

(1) Only non-conductors can be charged by rubbing (why?)

(2) Electrons can flow into and out of only conductors, and only when the conductors are in contact with other conductors (why?)

(3) A charged object can attract a neutral conductor (why?) and a charged object can also attract a neutral non-conductor (why?)

(4) Upon contact with a highly charged object, a conductor behaves differently from a non-conductor (why?)

Rgds,

Ilyasa, M.Ed, PGDE, ex-MOE Math and Physics teacher (hp: 97860411)

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Posted in Pure Physics

Sec 4 Physics Reflections sun1415 20/01/2013 – Electrostatics

I completed the teaching of Electrostatics to this class of 6 eager boys from a top school. First I showed a video of how a home-made electroscope is used to determine the kind of charge on a rubbed insulator.

I like to link topics to real life, so I described to them one of my roles while serving NS – to attach cargo to the bottom of a helicopter in what is commonly known as “underslung” operations. But we have to discharge the helicopter first, which is flying above our heads, using a long earth wire, else we may get an electric shock.

We covered definitions, procedures and concepts such as electric field and electric field lines. I even taught them an A-Level formula, F = Qq/kr^2, so that they understand that the electric force between two charged particles is the same for both charges even though the sizes of the charge on them are different.

We also discussed answers to a challenging worksheet and true enough, the students have certain misconceptions about charges and their movement.

Next week, we’ll start on Current Electricity. It’ll be fun.

Ilyasa, M.Ed, PGDE, ex-MOE teacher

(hp: 97860411)

 

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Posted in Pure Physics

Reflections on Sec 4 Physics class (9/12/12) …

Just like in the Sec 4 A Math class ytdy, we revised Sec 3 Physics instead, but I will move on to Electricity in Jan 2013. The two students in this class are from Nan Hua and NJC, in case you want to know, although I find it strange that parents ask me which schs the students come from (I’ll write another article soon – ‘The kinds of parents who call me’). C’mon, if you are weak in Physics, you are weak in Physics, even if you are a graduate from Harvard. Apparently, parents are concerned about the syllabi. However, let me tell you something – even two IP schs or two non-IP schs can be at different topics in Physics at the same time. As for level of difficulty, Sec 4 Physics is Sec 4 Physics; no IP sch is going to teach Quantum Physics at Sec 4 ok, except, maybe, NUS High. In fact, some O-level sch prelim papers are harder than those of the IP schools.

We covered Kinematics and Moments ytdy, and as usual, students have misconceptions about free-falling objects, free body diagrams, kinematics graphs and what constitutes ‘perpendicular distance’ and ‘line of action of the force’ in the calculation of moments. Since they were new students, I also listed the 6 ways that examiners make physics questions difficult, and these have nothing to do with physics! (I will post an article abt this some time soon). Every year, I find that students THINK that they know Kinematics and Dynamics, but they can’t answer some conceptual questions I ask. Even some JC students have actually not understood their Sec 3 Physics!

Ilyasa

Related post:

(1) Sec 4 Physics tuition.

Posted in H1 Physics, JC Math (H2/H1), Pri Math, Pure Physics, Sec Math

Metacognition – The ‘secret’ to learning and problem-solving …

You don’t have to be ‘good in English but bad in Math’, or ‘good in Science but lousy in History or Literature’, or ‘good in Chinese but lousy in English’. It doesn’t have to be a one-or-the-other kind of thing. Every subject has its own way of learning and thinking about, but you can only discover it if you bring yourself one level up – think about the thinking itself, and think about how you learn. You can only learn how to learn if you think about learning. You can only learn how to think if you think about thinking.

Thinking about thinking has another name: metacognition, which formed the basis of my minor research work completed in 2011 at the NIE. A lot of research into metacognition centers around mathematical problem-solving, although metacognition can be applied equally well to other subjects. So for the purpose of illustration here, I will use math as the basis for our discussion about metacognition.

What is Metacognition?

In its simplest form, metacognition can be described as thinking about thinking (Wellman, 1985). Flavell (1976) has stated some examples of what constitutes metacognition:

I am engaging in metacognition if I notice that I am having more trouble learning A than B; if it strikes me that I should double-check C before accepting it as a fact; (…)if I become aware that I am not sure what the experimenter really wants me to do; if I sense I had better make a note of D because I may forget I; if I think to ask someone about E to see if I have it right. (p. 232).

The above sounds familiar, doesn’t it? Yes, you may have been practising metacognition sub-consciously, all your life, without realising it has a formal name, or without realising how important it is to learning and thinking.

Research in metacognition has examined various forms of cognitive processes by building on Flavell’s initial notion of metacognition as the monitoring, regulation and arrangement of thinking processes to achieve specified goals (Gama, 2004).

For example, Brown (1987) argues that metacognition consists of two components: knowledge of cognition, and regulation of cognition. The former involves being aware of one’s cognitive abilities through self-reflection while the latter pertains to mental activities such as monitoring and controlling one’s thinking processes in the course of learning or problem-solving. According to Brown, although these two types of metacognition are distinct from one another, they are usually used together in the same cognitive process as one type often utilises the service of the other (Gama, 2004).

Wishing you all the best in your studies,

Ilyasa

(hp: 97860411)

 

Note: The above paragraphs are adapted from my minor research paper, Examining Supports for Metacognition in Singaporean Lower Secondary Mathematics Textbooks, NIE, 2011. All rights reserved.

Related links:

(1) Metacognition and problem-solving;

(2) Metacognition enhances learning;

(3) Is Metacognition part of the Singapore Math curriculum?

 

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Posted in Headstart Classes, Holiday Classes, Pure Physics

Sec 4 Physics Nov/Dec 2012 Headstart Programme – Electricity

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ORIGINAL POST(OUTDATED):

 

The details of the 2-day, 6-hr programme are as follows:

Date/Time (choose one pair of sessions only):

(1) Sat 24 Nov (10 am to 1 pm) and Sun 25 Nov (10 am to 1 pm);

(2) Sat 8 Dec (10 am to 1 pm) and Sun 9 Dec (10 am to 1 pm);

Location: Blk 627, Bukit Batok Central, 07-640.

Class size: Max 6 students.

Investment amt: $150 total for both days (6 hrs).

Topics: Electrostatics, Current Electricity

Tutor:  Mr Ilyasa; M.Ed (NIE), PGDE (NIE), BSc (NUS), A-Level (RJC); ex-sch teacher, full-time tutor (8 years) of PSLE, O and A Level Math and Physics.

To book a place in the programme, sms to or call Mr Ilyasa at 97860411.

Posted in A. Math, Pure Physics, Sec Math

Sec 4 Physics, A. Maths One-to-One Tuition

 

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Objective: Intensive Revision or Crash Course for O-Levels 2013

Focus: Understanding Key Concepts, Problem-Solving Techniques, Difficult Topics

 

DETAILS:

Available Time Slots:

Mon 4pm – 7pm

Thur 1.30pm – 4.30pm, 8pm – 10pm

Fri 6pm – 8pm

Sat 9am – 11am

Investment Amt: $80 per hr

Tutor: Mr Ilyasa; M.Ed (NIE), PGDE (NIE), BSc (NUS), A-Level (RJC); ex-sch teacher, full-time tutor (8 years) of PSLE, O and A Level Math and Physics.

Location: Blk 627 Bukit Batok Central #07-640

Average Class Size: 2-6 students

 

For appointment, call or sms to 97860411. Thank you.

Posted in Pure Physics

Sec 4 Pure Physics Intensive Revision for O-Level @ Bt Batok by qualified and exp. tutor

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ORIGINAL POST (OUTDATED):

 

 

If you need Topical Intensive Revision for Pure Physics for the coming O-Levels, the following programme is suitable for you:

Day/Time:  Every Monday, Wednesday and Friday, 6 pm to 7.30 pm (each slot is a different topic according to the Physics syllabus)

Start Date:  Monday, 27 August.

Location: Blk 627, Bukit Batok Central.

Class size: 2 to 5 students.

Investment amt: $50 per session.

Tutor:  Mr Ilyasa; M.Ed (NIE), PGDE (NIE), BSc (NUS), A-Level (RJC); ex-sec teacher (3 years); full-time tutor of O and A Level Math and Physics (8 years). To see his detailed resume, click here.

To book a tuition slot, sms to or call Mr Ilyasa at 97860411.

Posted in A-Level, A. Math, Individual Tuition, Integrated Programme (IP), JC Math (H2/H1), Pure Physics

Ad hoc Individual Consultation for Math and Physics …

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CALL 65694897 OR SMS 98530744 OR 97860411.

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ORIGINAL POST (OUTDATED):

 

 

I understand that there are students who don’t need long-term tuition but are weak in certain topics and they just need to consult a qualified and experienced tutor about these topics since exams are near. I’ve re-organised some of my tuition slots this June hols, so now I have a few free slots that can be used for ad hoc or short-term, individual consultations for the following levels and subjects:

PSLE Math, Sec 4 Math (E/A/IP/IGCSE), Sec 4 Physics, H2/H1 Math.

Fees per hr: JC – $80, Sec – $60, Pri – $50. (Pay per lesson)

Contact no: 97860411

Timing of lesson: Call or sms to arrange.

Location: Blk 627, Bukit Batok Central (near West Mall, 3 min walk from Bt Batok MRT or bus interchange).

Tutor: Mr Ilyasa, M.Ed (NIE), PGDE (NIE), BSc (NUS), A-Level (RJC); ex-sch teacher, full-time tutor (8 years) of PSLE, O and A Level Math and Physics.

Posted in Pure Physics

New Sec 3 Pure Physics class ….

 

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ORIGINAL POST (OUTDATED):

 

 

Sec 3   Pure Physics:  (Investment amt:  $150 for 4 lessons).

Sunday 2.00pm to 3.30 pm; Course Code: s3physun200; (3 vacancies)

Starting 10 June 2012. The class size will be between 3 to 6 students the most.

This class will be taught by our Principal Tutor, Mr Ilyasa, a qualified teacher with more than ten years’ experience of teaching Physics from Sec 3 level to JC2. To see his resume, click here. To speak to him personally, call 97860411. To register for the class, sms Student Name and Course Code to 97860411. The first payment ($150) must be made before 10 June 2012 to reserve a place in the class. Thank you.