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Dominoes - An Inexpensive Manipulative to Use in Math

I am always looking for ordinary items that can be used in the classroom as manipulatives. I'm a firm believer in the Conceptual Development Model which advocates teaching the concrete (using manipulatives) prior to moving to the pictorial before even thinking about the abstract. When I was at the Dollar Tree (a great, inexpensive place to purchase school stuff) I saw sets of dominoes for $1.00 each. Since they were inexpensive and readily available, I decided to create several math activities and games to introduce, reinforce, or reteach math concepts.

The Number 52
Think about it; if you lay a domino horizontally, you have a two digit number. Put two dominoes side-by-side, and a four digit number is created. Now you can work with place value, estimation, or rounding.  How about lining up dominoes in a column, and working on addition (with or without regrouping) or subtraction (with or without renaming)? 

Another perfect domino activity is practicing addition or multiplication facts.  How about adding the two sides of the domino or multiplying the two sides together?

The Fraction 1/4
If a domino is placed vertically, you immediately have a fraction.  Placed one way it is a proper fraction, but rotated around, it is an improper fraction which can then be reduced.  A fraction can also be changed into a division problem, a ratio, a decimal, or a percent.

So think outside that box of dominoes and use them as an inexpensive math manipulative because Dots Lots of Fun!

Check out all my Domino Resources available on Teachers Pay Teachers.
The first two are absolutely FREE!
  1. Dots Fun for Everyone - FREE  Three math activities and one game for the intermediate grades.
  2. Dots Fun - FREE  Three math activities and one game for the primary grades.
  3. Dots Fun   A 24 page resource for grades 1-3 that includes 13 math activities and four games.
  4. Dots Fun for Everyone  A 29 page resource that features 15 math activities and three games for grades 3-6.
  5. Dots Lots of Fun  Seven math games that use dominoes for grades 2-5.

Easter - The Most Important Holiday for Christians

For most schools in Kansas, there is no school on Good Friday.  Good Friday is always two days before Easter and commemorates the crucifixion of Jesus Christ and His cruel death on Calvary. Christian theology teaches that Christ's death is the perfect atonement for sins, and as a result, the crucifix, or cross, is one of the fundamental symbols of Christianity.

On Easter, our family will gather at church to celebrate Jesus Christ's resurrection from the dead. The New Testament teaches that the resurrection of Jesus is the foundation of Christianity. It establishes Jesus as the powerful Son of God and as a living Savior because He conquered death through His resurrection. It is a day of joyous celebration when many hymns as well as arrangements of special music and songs of the faith are sung.

In our current culture, I'm not sure what people really know or understand about Easter, especially children. Is it just Easter egg hunts, Easter candy and chocolate Easter bunnies? To find out what my group of girls at church knew, I created an Easter Crossword Puzzle based on the Gospels of Matthew, Mark, Luke and John. 

$3.00
The purpose of these two crosswords is to practice, review, and study the true story of Easter. Both feature 25 clues with corresponding Bible references where the answers can be found. The clues are: Judas, darkness, angel, feet, thirty, Peter, Barabbas, two, Jews, Joseph, tomb, stone, Mary Magdalene, thorns, purple, Thomas, resurrection, bread, blood, Gethsemane, three, crucify, Simon, Golgotha and risen. One crossword includes a word bank which makes it easier to solve while the more challenging one does not. Even though the same 25 clues are used for each crossword, each grid is laid out in a different way; so, you have two distinct puzzles. Here are some ways you might use these puzzles with your children:
  • Use as a review or as an introduction to the true Biblical Easter story.
  • Work in groups to complete the crossword, using the Bible references to look up the verses.
  • Use the puzzle with the word bank as a review; then hand out the second puzzle to solve.

I am thankful for this holiday and for the grace of Jesus Christ.
Happy Easter!

What is the real purpose of homework?



Dictionary.com defines homework as "schoolwork assigned to be done outside the classroom (distinguished from classwork)", but is homework beneficial? Teaching on the college level, I see many benefits to those students who have been required to complete real homework in high school. Here are just a few.

1) Homework can improve student achievement. Studies show that homework improves student achievement in terms of better grades, test results, and the likelihood of attending college.

2) Homework helps to reinforce learning and to develop good study habits and life skills. Homework assists students in developing key skills that they will use throughout their lives, such as accountability, self-sufficiency, discipline, time management, self-direction, critical thinking, and independent problem-solving. Homework assignments given to students actually help students prepare for getting a higher education degree. In fact, the more time a student spends honing his skills, the higher his chances are to enter the University of his dreams or later acquire the work he always wanted to do.

3) Homework can make students more responsible. Knowing that each homework assignment has a specific deadline that cannot be postponed makes students more responsible. It requires grit (perseverance), teaches them time management and causes them to prioritize their time for academic lessons.

As you read this list, I know there are many of you, especially those who have small children or teach younger children, who disagree. I am not here to argue about whether homework is appropriate in the lower grades, but I do want to advocate real homework on the high school level. When I say real homework here is what I mean.

In high school, students might finish their homework in the hall right before class and still earn a good grade; that just isn't possible in college. Homework may be due on a certain day, but it is acceptable if it is turned late. This typically doesn’t float on the college level. In high school, a student gets to the end of a semester and needs a few more points to pull up a grade because of missing or incomplete assignments; so, the student asks the teacher for extra credit work. Extra credit does not exist on the college level! You do the work you are given when you are given it!

I teach college freshmen, many who are woefully unprepared for the academic rigors and demands that are expected. For every one hour students take in college, they should expect two hours of outside work. In other words, if a student is taking 12 hours, they should expect to spend 24 hours on homework (12 x 2).  Of course this formula doesn't always work perfectly, but it is a good starting point. Usually, college freshmen are in disbelief that they are expected to spend so much time on work outside of class. In reality, they should expect to spend as much time on homework in college as they would at a job because college is a full time job!
Help, we're sinking!

When I hand out my syllabus, many of my freshmen are astonished when they discover the amount of homework I expect and require them to do (readings, papers, on-line research, projects, etc.)  AND to compound the problem, many instructors (including me) expect it to be done and handed in on time! Unfortunately, several students have to test the waters to find out that late papers are not accepted.

For those college students who've had little real homework in high school compounded by teachers who have allowed it to be turned in late, those students are aboard a sinking ship that is leaking fast! Sadly, those are the 2-3 students who fail my required class and have to retake it the next semester.

So, as you can see, the decision to agree with or disagree with assignments is really up to the student, but also they need to remember that the learning institution they attend has rules in place regarding assignments. And if homework is assigned, then it will need to be completed and handed in on time, or the impact on the final semester grade will certainly be negative.
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$1.80
Want a quicker and easier way to grade math homework? Try one of these two math rubrics. I still use them on the college level, and they save me a great deal of time!

Making Perfect Circles by Using Coffee Filters

When I teach angles or the properties of circles, I find that most children have difficulty cutting out a true circle (even with a blackline).  I have resorted to purchasing cheap coffee filters (not the cone shaped ones) and ironing them flat. You can iron several filters at one time, and once they are ironed, they form excellent ready-made circles. Here are some of the ways you can teach angles using these circles.
    Writing Formulas on the Coffee Filter Circle
  1. Introduce the fact that each and every circle contains 360 degrees.
  2. Have the students fold their coffee filter in half. Discuss that this is a straight angle. Ask, “How many degrees does it contain if it is one-half of a circle?” (180 degrees)
  3. Have the students fold the coffee filter one more time, into fourths. Talk about this angle being called a right angle and that it contains 90 degrees. Ask, "What fractional part of a circle is this?"
  4. Have the students use this fourth of a circle to locate places in the classroom where it will fit (e.g. the corner of their desk, a corner of a book, a corner of the board).
  5. Explain that these corners are right angles and without right angles, we would live in a crooked world. Nothing would be straight!
  6. With older students, have them write the parts of the circle and the formulas needed for solving problems about circles on the coffee filter circle.
Linking Math and Literature for Older Students

Read Sir Cumference and the First Round Table (A Math Adventure) by Cindy Neuschwander. This is a story about a clever knight of King Arthur’s named Sir Cumference. By using ideas offered by the knight’s wife, Lady Di of Ameter, and his son, Radius, King Arthur finds the perfect shape for his table. Basic geometric vocabulary involving circles (circumference, radius, and diameter) is introduced.
$3.50

Want more hands-on ideas for teaching angles? Check out Angles: Hands-On Geometry Activities.

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