Curated OER
Doubles and Halves 3
Build mental math skills by teaching learners to double and half three-digit numbers. They start out by doubling one of seven double-digit numbers. Next, they discuss their strategy, and then practice doubling and halving 3-digit...
Curated OER
Locating Fractions Greater than One on the Number Line
Supplement your lesson on improper fractions with this simple resource. Working on number lines labeled with whole numbers between 0 and 5, young mathematicians represent basic improper fractions with halves and thirds. The fractions...
Illustrative Mathematics
Representing Half of a Circle
Geometric shapes make great visual models for introducing young mathematicians to the concept of fractions. Looking at a series of four circles, students are asked to determine whether or not one half of each circle is shaded. To support...
Curated OER
Fraction Introduction
Introduce fractions as a part/whole relationship. The slides in this resource show whole objects, half objects, and then relate the images to their numeric equivalent. This is a simple and basic introduction that uses a variety of...
Exploratorium
Radioactive Decay Model
Toss 100 pennies (or poker chips or any other two-different-sided objects) and remove all of those displaying tails. Line them up and repeat. The lines of pennies collected get smaller each time, successfully representing half-life.
Curated OER
Half Math
In this beginning fractions activity, students solve four problems in which the same geometric figure is divided in half two different ways.
Curated OER
Teaching Radioactive Decay: Radioactive Half-life And Dating Techniques
Learners generate a radioactive decay table for an imaginary element using a box filled with pinto beans and M&M's. They use their data to plot a decay graph, develop the concept of half-life, and use the graph to "age" several samples.
Curated OER
Harry Potter and the Half-Blood Prince Quiz
In this online interactive reading comprehension worksheet, learners respond to 25 multiple choice questions about Rowling's Harry Potter and the Half-Blood Prince. Students may submit their answers to be scored.
Curated OER
Halves, Thirds, and Sixths
An excellent activity that effectively pulls together the concepts of area, fractions, and equivalent fractions! Using 3x2 rectangular arrays, 3rd graders are introduced to the concept of area in terms of square units. Building on this...
Curated OER
Half Math Quilt
Help your third graders become familiar with equivalent fractions for one-half by having them create a quilt. They will use triangles to create a quilt of equivalent fractions over a period of 6 days. As they create the quilt pieces they...
Franklin College
Tell Time to the Nearest Half-hour and Relate to Events
Youngsters examine how to tell time to the nearest half-hour. They discuss why people wear watches, listen to the book "What Time Is It?" by Sheila Keenan, view examples on a model clock, and complete a worksheet with the teacher.
Curated OER
Halves And Fourths #2
Early learners look at the pictures given and color one part to identify if it is 1/2 or 1/4. They then circle the correct fraction that they created.
Curated OER
Linear Inequalities in One and Two Variables: Rays and Half Planes
Define rays and half planes, including the concepts of boundary lines and prerequisite knowledge of coordinate planes. Given linear inequalities in one and two variables, your class will compare the differences. They will also graph...
Curated OER
Money: Half Dollars
In this counting coins worksheet, students solve 6 problems in which half dollars are counted and the total amount of money recorded in dollars and cents.
Curated OER
Thirteen Ways of Looking at a Half
In this problem solving thirteen ways worksheet, students observe squares that are divided into eight equal parts and solve thirteen ways to divide them into halves. Students color thirteen problems.
Curated OER
Fractions Worksheet 1 - Rectangles
Young learners read 2 examples of how to write fractions to show how much of a rectangle is shaded. Then students look at 9 diagrams of rectangles that have shaded areas. They write the fractional equivalent. Then they shade 3...
Curated OER
Half-life Worksheet
In this half-life activity, students determine how long it takes for a 100g sample of AU-198 to decay to 6.25g. Then they determine the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours. Students also...
Curated OER
Telling Time: Half Hours
Young mathematicians circle the clock in each of two rows that shows the time that is written. Everyone draws the hands on four clocks to display the times (to the half hour) shown. A good, basic worksheet.
Curated OER
Digital Clocks
Don't skip over digital clocks when teaching youngsters how to tell time; here are 10 opportunities for them to practice with half-hour increments. For the first five, they write the time below each clock. The format is word form (half...
Curated OER
Matching Fractions
Focus on halves, thirds, and fourths in these visual fraction activities. Scholars begin by examining a grid with various expressions of the three fractions displayed in the grid squares. They color-code the grid to indicate which...
Curated OER
Symmetry
Where is the line of symmetry? Learners begin by drawing in a line to split three images evenly in half, using an example as reference. Encourage them to think about physically folding the picture to solidify this concept. Next, they do...
Illustrative Mathematics
The Stamp Collection
By using language like "half of the stamps," children are exposed to patterns in arithmetic that requires solving a two-step word problem. This type of language opens a new door for transitioning learners toward understanding fractions...
Curated OER
Clocks and Watches
Telling time is an important skill. Beginners to this concept determine the time to the nearest half hour using both digital and analog clocks. There are two examples here demonstrating the form scholars should use when recording each...
Curated OER
Lines of Symmetry
Drawing lines of symmetry helps scholars understand shape attributes, basic fractions, and equality. They determine how many lines each of these nine shapes has, using an example as reference. Consider having learners cut out a set of...
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