# What’s My Equation? Array Math Puzzles

Here’s a simple idea that one reader submitted. Cut out a bunch of paper fall leaves (or any seasonal shape, like snowflakes for winter, hearts for Valentine’s Day, etc.) and laminate them. Then attach a magnet to the back.

Then put an array up on your white board. Ask your students what equation is depicted. There will be more than one way to write the equation.

Then discuss the answers as a class. For younger grades, the answer could be “4+4+4 = 12″ or +3+3+3+3=12”, but for upper grades the answer could also include “4×3=12” or “3×4=12”.This would make a great warm up for math lessons. Have any great ideas for building number sense? Send them to me at squareheadteachers at gmail dot com. ðŸ™‚

# Thanksgiving Number Match

Still working on matching numerals with word form numbers? Check out this simple page for kindergarten or first grade. Students write the numerals in the pie with the matching word form number. Enjoy!

Click here to download: Thanksgiving Pie Number Matching – younger grades

# Number Ninja (Hundreds Chart Puzzles)

Here are more of my hundreds chart puzzles in my Number Ninja Series. Each puzzle presents sections of the hundreds chart and requires them to fill in each section. This will help kids become more familiar with the hundreds chart, thus increasing their number sense and ability to recognize patterns within it.

Click here for the free printable puzzles:
Number ninja 4 KEYÂ  Â  Â  Number ninja 4
Number ninja 5 KEYÂ  Â  Â  Number ninja 5
Number ninja 6 KEYÂ  Â  Â  Number ninja 6

# Number Ninja (Hundreds Chart Puzzles)

I’ve put together some puzzles to help kids become more familiar with the hundreds chart. Â I want my kids to be so familiar with the hundredsÂ chart that they can make one by themselves on scratch paper during a test, and can also identify patterns in our base-10 number system. I’ve made a series of puzzles that increase in difficulty.

Click here for the first 3 levels:
Number ninja 1
Number ninja 2
Number ninja 3

# Counting Shamrocks

I haven’t made anything for kindergarteners lately. And when I saw this cute mouse clip art, I just HAD to do something with it! And here’s my creation… counting shamrocks! Students should fill in the missing number (sequenced 1-16) and then write how many shamrocks there are total. Happy St. Patrick’s Day!

Click here for the free printable PDF:Â Counting Shamrocks

# Counting on Fingers (Number Sense Activity)

I love this math activity. It’s genius on so many levels! This would help students with addition and subtraction, but also to teach “the 9’s trick” with multiplication! It would be a great introductory/review activity at the beginning of the year, especially to have each student trace their own hands and make one of these themselves. Â (source)

I know many parents (and some teachers) don’t like it when kids use their fingers to count or do math. Many see it as a sign of weakness of lack of understanding. However, each time you allow a child to use their fingers (or a hundreds chart or multiplication chart, for that matter) to get the right answer, you’re providing them an opportunity to discover and work for the CORRECT answer. Eventually kids will learn their facts from repetition or they’ll get tired of being the only one without them memorized and they’ll fix the problem. After all, speed isn’t what’s important in math. YES, it definitely helps and it has clear advantages, but it’s not the end-all, be-all. There, I’m done with my soap box; I’ll put it away now. ðŸ™‚

# Inquiry Lesson: Sieve of Eratosthenes (Prime Numbers)

A friend of mine uses this lesson to teach her students about prime numbers, and prime factorization. (Note the lesson plan’s author is also named Mindy!). I’ve tried it with 6th graders and it’s pretty clear cut. Each student gets to work with a different number, creating a good learning experience for all. Here’s the lesson:Â Math Inquiry Lesson

If you’re not familiar with the Sieve of Eratosthenes, here’s the Wikipedia article.