In this reflection piece I assess and analyze an activity I did with the students and what I learned from it in terms of pedagogical knowledge, prior knowledge and previously learned information
Teaching math (or any other subject) requires understanding of the nature of the student’s content understandings and their ways of representing knowledge. It is important to understand how students represent knowledge. I, as a teacher need have a good understanding of the common learning difficulties and preconception of students.
I want to talk a little about a lesson I did, which was dividing decimals.
My vision:
present the question on the board
how do I divide 1.5/2.5
before telling them the rule of dividing decimals, ask them how we divide 15/25
let them solve it
the answer is 0.6
notice how 1.5/2.5 is equivalent to 15/25 (multiply both sides by 10)
so 1.5/2.5 = 0.6
Write another example on the board 0.25/1.5
before we solve it, ask students to solve 25/150
the answer is 1.66…
notice how 0.25/1.5 is equivalent to 25/150, they have the same value so
so 0.25/1.5 = 1.66
Ask them to solve 2.1/.3 don’t give them any hints, walk around the class and see how they Solve it. Find out whether or not they have figured out the pattern.
Solve the example on the board: 2.1/0.3 is equivalent to 21/3, so the answer is 7
Explain the rule, make sure they understand how we can find the equivalent (multiply by 10 or 100) give few more examples and let them solve it, walk around the class to give one on one help.
I wanted the students to see how we can easily divide decimals by changing them to something that we know how to divide. Since they already know what equivalent fractions are, I thought presenting the lesson that way was a good idea, and it would make dividing decimals easy.
How it went:
the students have already learned dividing decimal in pervious grades (I think grade five). When I asked them to solve examples, many of them tried to use the method they learned in the past: which was move the decimal of the denominator, then divide and move the decimal back)
As I was walking around to see what they are doing, many were solving it using their way. And those who were trying to solve it my way were asking me “when do I move the decimal back?”
It is clear that as I was presenting the lesson, many were trying connect what I was saying with what they learned previously, which created a big confusion.
I think teaching math takes much more than knowing the material. It takes knowing how to present it as well as knowing how the students think and how they will perceive it.
Teaching math (or any other subject) requires understanding of the nature of the student’s content understandings and their ways of representing knowledge. It is important to understand how students represent knowledge. I, as a teacher need have a good understanding of the common learning difficulties and preconception of students.
I want to talk a little about a lesson I did, which was dividing decimals.
My vision:
present the question on the board
how do I divide 1.5/2.5
before telling them the rule of dividing decimals, ask them how we divide 15/25
let them solve it
the answer is 0.6
notice how 1.5/2.5 is equivalent to 15/25 (multiply both sides by 10)
so 1.5/2.5 = 0.6
Write another example on the board 0.25/1.5
before we solve it, ask students to solve 25/150
the answer is 1.66…
notice how 0.25/1.5 is equivalent to 25/150, they have the same value so
so 0.25/1.5 = 1.66
Ask them to solve 2.1/.3 don’t give them any hints, walk around the class and see how they Solve it. Find out whether or not they have figured out the pattern.
Solve the example on the board: 2.1/0.3 is equivalent to 21/3, so the answer is 7
Explain the rule, make sure they understand how we can find the equivalent (multiply by 10 or 100) give few more examples and let them solve it, walk around the class to give one on one help.
I wanted the students to see how we can easily divide decimals by changing them to something that we know how to divide. Since they already know what equivalent fractions are, I thought presenting the lesson that way was a good idea, and it would make dividing decimals easy.
How it went:
the students have already learned dividing decimal in pervious grades (I think grade five). When I asked them to solve examples, many of them tried to use the method they learned in the past: which was move the decimal of the denominator, then divide and move the decimal back)
As I was walking around to see what they are doing, many were solving it using their way. And those who were trying to solve it my way were asking me “when do I move the decimal back?”
It is clear that as I was presenting the lesson, many were trying connect what I was saying with what they learned previously, which created a big confusion.
I think teaching math takes much more than knowing the material. It takes knowing how to present it as well as knowing how the students think and how they will perceive it.