Co-Teaching+Grade+3+Lesson

**March 21, 2012 **
===**Co-teaching Lesson - Multiplication ( ****Molly, Jennifer V., Emilia) **===


 * __Learning Goal __**
 * 3m21 **- count forward by 1’s, 2’s, 5’s 10’s … from various starting points… using a variety of tools and strategies
 * 3m27 **- relate multiplication of one-digit numbers… to real life situations, using a variety of tools and strategies
 * 3m28 **– multiply to 7 x 7 … using a variety of mental strategies

//Lyn repairs bicycles. // //It takes her 1 minute to fill each tire on a bicycle // //Can Lyn fill the tires on 7 bicycles in 15 minutes? // Represent the solution in 2 different ways
 * __Task problem __**

Solution 1: repeated addition by 1’s using counters <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Solution 2: repeated addition by 2’s using diagrams <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Solution 3: repeated addition using a number line, jumping by 2’s <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Solution 4: repeated addition using a T-chart <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Solution 5: repeated addition using array <span style="font-family: 'arial','sans-serif'; font-size: 13px; text-decoration: underline;"> <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">We can solve the problem by: <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Using repeated addition by 1’s <span style="font-family: 'Arial','sans-serif'; font-size: 13px;">1+1+1+1+1+1+1+1+1+1+1+1+1+1 = 14 tires
 * __<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Solutions __**
 * __<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Highlights/Summary __**

<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">2 + 2 + 2 + 2 + 2 + 2 + 2 = 14 tires <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Counting by 2’s <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Using T- chart to show repeated addition <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Using arrays to show columns and rows or groups

<span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Organized randomness was clearly experienced by the way the three of us collaborated to handle the unexpected students’ solutions <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Keeping our goals in mind is very important to maintain focus with the students. <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Children had difficulty understanding that repeated addition is not just an addition equation, but can be represented in different ways (equivalent expressions). Making the math explicit <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Consistent use of colour to reflect math vocabulary, strategies and actions (hard to remember, maybe start with a couple, keep it simple) <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Some students had difficulty identifying groups and group size in the problem. <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Separating the key information from the question was a difficult point for many students <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- The pacing of the lesson to ensure we have reflective time at the end <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Stay on lesson goal when writing the summary/highlights <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Allow students to explain their solutions from their sitting position <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Make sure we have enough board space <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Ensure students always have visual access to the main problem <span style="font-family: 'arial','sans-serif'; font-size: 13px;">- Identifying groups, group size, related to multiplication phrases and (possibly, if time) equations.
 * __<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">What did you learn? __**
 * __<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">What would you change in the lesson given what you know now? __**
 * __<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">What will be tomorrow’s lesson? __**