Second Grade, Math, Set Three

• Numeration
• We used the decahedron to make a four-digit number. Then we wrote it and used the word cards to make the the number. For instance: 4,612 and four thousand, six hundred twelve
• Then we used the spinner to choose 10 more or less or 100 more or less, and wrote that number. There were a couple times when we had to rename to write the 100 or 10 less.
• Another day we just used the decahedron to make numbers and see who had the largest number the most times.
• Even and Odd
• We took turns drawing three UNO cards and then made the largest odd number we could.
• Rounding
• We drew two UNO cards, and with a number line, decided what it would round to.
• During week 5 we took a day to work some more on rounding.
• I wrote out some 2-digit numbers and (after a little reminder) K. rounded to the nearest ten.
• Then I wrote some 3-digit numbers and showed her how to round to the nearest hundred.
• Next, I set up a practical activity. I told a little story about going grocery shopping and said we bought milk (I wrote down $2.68), eggs ($1.98), meat ($5.10), oatmeal ($2.50), and yogurt ($1.20). I had her round each amount to the nearest dollar (hundred) and add it up. Then I let her use the calculator and add up the exact amounts. She could see how close the rounded total was to the exact total, and how rounding is helpful when you need to keep track of how much money we are spending at the store, but don't want to add up exact amounts.
• Word Problems
• Everyday Number Stories by George Baker Longan, published in 1915. I'm not sure how far we will go in the book. I am mostly just picking out the number stories.
• Statistics
• Statistics by Jane Jonas Srivastava -- we read the introduction through page 9; then we did the red/yellow bead activity.
• Addition and Subtraction
• We played Addition/Subtraction Bingo
• I made bingo cards with numbers and corresponding playing cards with equations on them.
• We took turns turning over the playing cards, and putting beans on the answers.
• We played Storm the Castle -- you can get this game from Ellen McHenry's Basement Workshop
• We played Storm the Castle again during week 5. However, this time we raced to see who could get across the bridge first. I had put one Milk Dud inside the castle, so the person who won would get something, but it wouldn't be that big of a deal to lose. K. won by half a second! She used the cards from SKIP-BO Junior and I used the UNO cards.
• We went outside and did four-digit addition and subtraction problems with sidewalk chalk on the driveway.
• Missing Addends -- I printed a worksheet from the internet and taught K. how to turn the addition problem into a subtraction equation to find the missing addend. These addition problems were very simple, and she really didn't need to do the subtraction problem to know the answer, but I wanted her to learn how it worked.
• Fractions
• Comparing Fractions -- I found a worksheet that had some fractions with the same denominators and some with the same numerators. She was really good at comparing the fractions with the same denominators, but was confused about the others, so we took a couple bananas and cut one into fifths and the other into sevenths. I asked her which was more, 3/5 or 3/7. Then she understood.
• Geometry
• Area -- I printed a couple worksheets from education.com and one from superteacherworksheets.com. These were just very simple -- find the areas by counting the square units and write the answer.
• After the worksheets we went into her room and counted the number of floor tiles along the width and length of her rug. Then we drew it on graph paper and counted to find out the number of square tiles her rug took up. Then we did the same thing with her bed.
• Perimeter -- I printed a worksheet from Scott Foresman, grade 2 math. On it she had to use a ruler and measure the length of each side of the shapes, and add them up. From education.com, there was one worksheet that had four problems that gave the measurements for each side and five word problems. The other worksheet had different shaped houses and she needed to find the one with the largest perimeter for Mr. Piggy to live in. I let her use the calculator for this sheet.
• Lines -- I taught K. what horizontal, vertical, parallel, and intersecting lines were. Then we found examples of each around the house.
• Another day we looked for each type of lines while we were driving around doing the grocery shopping.
• Multiplication
• I had written out some word problems, such as, There were seven lily pads on the pond. Each lily pad had three frogs on it. How many frogs were there?
• First, K. drew a picture to demonstrate the word problem.
• Then, we wrote a repeated addition equation and solved it.
• Last, we wrote the multiplication equation and solved it.
• Division
• Equal Sets
• We gathered a bunch of beads and 5 stuffed animals.
• I put out a certain number of beads and stuffed animals and had K. divide the beads between the animals. You should always have an amount that will divide evenly.
• Then we wrote the division equation and repeated addition equation.
• Division as Grouping from Dazzling Division by Lynette Long
• Put 12 cookies or crackers or raisins (the dividend) on a serving plate. Put out two small plates (the divisor) and divide the cookies equally between the two plates.
• Do the same with 3 plates, 4 plates, 6 plates, and 12 plates.
• Write out the five different division problems you solved.
• Division as Repeated Subtraction from Dazzling Division
• Write the problem: 30 ÷ 10.
• Start with 30 paper clips. Thirty is the dividend.
• Take away 10 paper clips and put them in a pile. Ten is the divisor.
• Take away 10 more paper clips and put them in a second pile.
• Take away the last 10 paper clips and put them in a third pile.
• How many times did you subtract 10 from 30 to get to 0? Count the piles of paper clips. Three is the quotient.
• Solve 30 ÷ 6 and 30 ÷ 2 the same way.