Showing posts with label subtracting. Show all posts
Showing posts with label subtracting. Show all posts

Thursday, September 6, 2012

Best Investment Ever

I think my most favorite "purchased" item that I had in my classroom was my large dice. 

I am fortunate that my school purchased them for me, but unfortunate as I could not take them with me when I left.



Click to View Video and Other ImagesThese are the ones I used: Large Dice

 They are from Discount School Supply and currently retail for $37.  Yeah, that is a lot, but I did not have to pay for them!  :)


I bet you can find cheaper ones.  Or go in on a set with another teacher.






Prior to owning these dice, I had made my own out of square boxes I acquired somewhere.  My home made dice lasted about 3 years, and I was not able to change what each face said.  So one had numerals and the other had dots. 

This is a picture of my "old" dice:

So how did I use the dice?  Oh my gosh is SO many ways!  If you have read some of my early posts, you may remember I am big on being active in the classroom.  Maybe cause my students were all so young, but I feel like even the older students can benefit by them as well.  This set let me put movements into the activity that we may not have normally thought of.




Young students: roll 1 die; start with dots then move up to numerals.  Have 1 student count the dots then choose a movement for the class to do "that many" times.  To get more students involved at once, have one student roll, one count, and another pick the activity.  I used this activity without the dice as we learned about each number; this is a great way to review all numbers you have covered so far, or you can put the same number on each side, so it always comes up "3."  See how long it takes the kids to catch on!  I usually prompt the first few movements, like "clap three times" or "jump three times" (make sure you wear comfy shoes that day) then let the kids take over.  Really gets those wiggles out of the little ones.




Preschool students: you can use the dice as part of a themed activity where they make a physical connection to objects based on the roll of the dice.  Here, the student could roll a die, either read the numeral or count the dots, then "feed" the squirrel that many acorns.  Can be adapted to ANYTHING - put that many apples/leaves/snowflakes on (or take off) a tree; make a tower with that many blocks; count out that many goldfish for snack, you get the idea. 



Pre-Kindergarten students: once your students recognize their numerals add the second die and they can match sets.  Roll the two dice; did you get a match?  Are there more or less dots than the number you rolled?  Could not find pictures of that in action. But...

Kindergarten and first grade: here the students used the big dice in a couple ways, then followed up with a small group and individual activity with small dice.



The rolled the dice and the students tallied on the white board how many times each number came up.  This was partial tally writing and partial probability lesson.  I find this is a great activity to cover both concepts in a fun way.


The students working on their individual tallies.  I asked them to roll their die a specific number of times, like 40.  So they had to keep adding their tallies up to see when they hit 40. :)






Another way we used the big dice was for addition and subtraction practice.  We used the dice as a group activity, counting the dots chorally to add.  I would (or sometimes a student) write the addition sentence on the white board so we could "see" what we just did verbally.  As time went on, the dice were changed to have numerals on them, and we used small manipulatives (coins in this picture) to add. 



For subtraction, I had one dice with numbers 5 and above, and the other dice had 0 - 4.  We had to work harder to find the difference than we did for the sum, but the kids caught on pretty well.  At first we wrote the numbers that we rolled on the board, and figured out which on was "greater." We then wrote the subtraction sentence and added attribute block magnets to represent the larger number.  We took away the smaller number and voila! We found the difference.  Older students can roll the dice to add more than two numbers, multiply, or divide.  Orrrrrrr...you can use it for place value identification. 

Another example of using the dice is in my post titled Making Numbers 5/26/2012.

By using dice that  you can change the faces, you can customize the dice to every activity. I used them once to build a snowman; they students had to roll six different body "parts" to build the "whole" snowman.  But that is a whole other concept!

Does anyone else have big dice they use in their classroom?  Can you share some of your activities?  This is just a small sampling of what can be done.  Hope I've inspired you a bit today, to get those kids up and moving instead of sitting in chairs all day.  Math should be hands on, and fun!!

Kathy

Sunday, September 2, 2012

Clothesline Math Game Posted

Okay, one product done and posted!

Clothesline Number Games 0-20

This set includes two spinners, one with four colors and one with six colors.  There are six sets of number cards 0 to 20, and the symbols +, -, =, <, and >.  A pencil and a paperclip finishes the spinner, and all you need is a clothesline, some spring-style clothespins from the dollar store, and a printer!  I suggest printing them on cardstock and/or laminating for longer use. 

Thanks to Graphics From The Pond for the spinners!

Graphics From the Pond



Thursday, August 16, 2012

Carrot Picking...or apple...or pumpkin...

One of my favorite activities to do at the beginning of the school year is to "pick apples from the tree."  I had a set of apples with numerals on them that had been handed down to me by a previous teacher; on one wall I had a big seasonal tree leftover from when I taught science.  The type you buy from a teachers supply store.  I put pieces of velcro on the tree, then on the apples.  Or leaves...which look like snowflakes in the winter when all the leaves have fallen off.  We used little pink flowers in the spring.

I used this tree for so many things; one of my favorite was to pick apples.  On the back of each apple there was a number up to 30.  The students would get a chance to pick an apple from a tree, then they had to tell me the number.  I had multiple apples with the same number on it, and would put up the appropriate numerals based on the age of the class coming in.

This is a great way for me to get a sense of numeral recognition at the beginning of the year.  I would keep a running record of which numerals they got correct and incorrect, and as the year went on I could add to it.  This helped me when assessment time of the year came; if they consistently recognized the numeral 3, I did not need to ask them that one.  I also used the apples to make sets; pick an apple then give me "that many" of something. 

Unfortunately my tree got destroyed and I cannot not locate a good picture of it to show you.  But I do have a picture of some young 3s (and visiting toddlers) "Carrot Picking" in our circle time area.  This was an activity I did in May, I think.






The kids had so much fun and did really well taking turns.  This is a simple shape to draw and copy onto colored construction paper.  I laminated a blank piece of green construction paper and made the tops, then taped them on.  Super quick and easy!  I know EVERYONE has an apple graphic somewhere in their files, and I bet everyone has a pumpkin too.  Fun hands-on activity, helps practice taking turns too.  My Kindergarteners had to pick two carrots and tell me the sum or difference, depending on the unit.  Great workstation if you have the space.  Let's those boys who need some movement in their learning get it out.

Hmmmm....bet you could have the kids order or group the numbers on  a clothesline... :)

Enjoy!  Kathy

Wednesday, May 30, 2012

"Breaking" 5

Tuesday the Pre-K classes did a one-day lesson on "breaking" numbers. AKA decomposing numbers.  The same person who I got the "making" number post-it idea inspired this lesson as well.


Before the lesson, I prepped the chart.

The first class is the younger of the two, so I wrote the facts up.  The second, older class has one without the facts.

Six students were chosen to place a post-it in each square, each student completing a row.  To get more involved, two additional students were chosen to "break" the row of 5.  The squares are pre-drawn so they can "see" what is missing.  Similar to putting an "X" on the ones we are breaking off in the original lesson I read.  One student broke off a piece of the row, and another fills in "how many are left." (The older class wrote the whole fact.)

Just as an introduction, I showed them how we can reverse the addition and subtraction sentences to make them "family." Using the language that will be oh so important in Kindergarten!!



Their hands-on activity was using cube trains to break apart the numbers.  The older class wrote on individual white boards while the younger class just used the manipulatives.  I was able to get a picture of the chart, then the battery on my camera died.  But you get the idea!