# Math Cabinet for equations

Finally, after a whole year, I managed today to finish my equation slips and start filling my math cabinet.  I borrowed the idea from What Did We Do Today, as usual.

But, my math cabinet post isn’t really about math cabinets.

I had a really hard time doing this last year because I was very confused on the concept of equation slips.  We weren’t really introduced to them in our training.  The equation slips I saw were so detailed.  For example, for addition, they would have static and dynamic, just like our training.  But then they would break it down into 2 digits + 2 digits, 3 digits + 2 digits, 4 digits + 4 digits, etc.  Some equation slips I’ve seen have those special cases like 0’s, 0’s in unit place, 0’s in tens place, etc.  I assumed that a child was to work through each step of these equations, which are increasing in difficulty much like how it’s presented in regular schools.  Totally different from the way I learned addition and subtraction in class.  Even multiplication, was split much finer than what we learned.

Finally, during my math class, my trainer tells me that students should be encouraged to generate their own math problems, she was mostly against pre-printed equation slips.  She said that they will hit those special cases during their work somehow and if I weren’t sure I could just do a quick assessment before allowing them to move on.  I had a Montessori teacher friend who talked about how her students decided to write a huge long string of numbers and divide them.  I saw the pic.  It must have been 30+ digits long.  They ran out of paper and had to tape more and more paper on the first sheet in order to solve the equation.  When I hear stories like that, I see how not having worksheets can really spark a child’s imagination in what they may want to try.   The elementary child really love big things, and trying things that you did not talk about during your presentation.

# DIY Nomenclature Cards or Flashcards

If you homeschool at home, suddenly there are many “tools” you need to get in order to make materials.  In Montessori education especially, there are many nomenclature cards.  A friend asked about laminator this week so I thought I’d note down the specific items I’ve used to make these cards.  Because I hate researching and I had to research for each one to find cheapest price.

1. 90lb Cardstock
Originally I tried using 110lb paper because I wanted the thickest card so it feels like a commercial product.  But alas, I discovered that anything over 90lb most home printers won’t print and cheap laminators won’t laminate.
2. 3-mil 9×11-1/2 Laminating pouches, 5-mil laminating pouches
I use both 3mil and 5mil. Again, I originally wanted 5mil for all my nomenclature cards. But when you start making massive amounts, you realize that you don’t really need 5 mil except in a few instances.  So I’ve used 5mil for things like bead arrows. In general I make my materials in the following combo:

• Regular paper + 3 mil lamination
• Cardstock + 3 mil lamination
• Cardstock + 5 mil lamination

For example, for the Hundred Board game, I used regular paper + 3 mil because this was a quick material. For a bit of flexibility in feel when you hold the cards, I use card stock + 3 mil. For example, the Fraction Game cards. For items I want to last a super long time, I use Cardstock + 5 mil. These are cards I want to reuse for a long time by Thumper and Astroboy or to resell later or small items like the bead chain arrows I rarely use 5 mil now. Every time I think of how fast the kids will go through the cards, I’m reluctant to use 5 mil.

3. Royal Laminator (PL2100)
Laminator can be super cheap or super expensive. I got a cheap one because I figured I wasn’t going to be doing it day in and day out. It does my 5 mil and 3 mil fine. I usually run each one through twice. I’ve seen better ones at work from Fellowes where you can specify up to 7 or 10 mil and it is HOT. But this one is only \$30 and it does the job.
4. Bypass Paper Trimmer
I went the expensive route for this cutter. Cutters are temperamental. The not so great ones just don’t allow you to cut straight. And the cheap ones sometimes don’t allow you to cut thick materials like 5 mil + card stock. I spend the money and the toner and ink to print something out, only to have it not be cut straight?! Drives me nuts.  For trimmers, I did some research and discovered that you don’t want the rotary ones.  Also some trimmers don’t allow you to change the blade.  I think this one does. I got a 50% off coupon and though it took several trips (I hate Joann’s! Long story) I did get the thing for around \$50.
5. Scissors- Fiskars 9 Inch Premier Titanium Nitride Shop Shears (12-96536984)
What I do at least 70% of the time is actually cut by hand. If you are patient, often this gives you a better cut than a cutter. Because I hate that white edges on my cards. Making materials really bring out the perfectionist in me. Though with 5 months of material making under my belt now, I’m starting to see why teachers have always not been so exact. You do get tired after awhile, especially knowing the children may be will only touch the material 1-2 days.
For scissors, I also went for a fairly good one because I’m cutting a 5 mil sometimes. I’m sure you can also get this while Joann’s Fabric has a sale.
6. Corner Rounder –  R Memory Keepers Crop-A-Dile Corner Chomper Tool
After you laminate and cut, I like to corner round each one. It is very sharp otherwise. And also a pain in the neck as it takes a long time. This corner rounder does 1/2″ and 1/4″. I usually do 1/4″. These things wear out quickly so you can’t have too many of them.

And let’s not go into the super expensive printer I bought to make my nomenclature cards and the tons of paper I burned through trying to print duplex correctly.