Curated OER
Fractions and Halves
Fourth graders examine halves of a whole and discover through activities that they must be exactly equal in size. Working with Geoboards and Dot-Paper Squares, the class practices finding halves that are both congruent and incongruent.
Curated OER
Dividing into Two Parts — Halves
In this fractions learning exercise, students divide pictures into halves to introduce them to fractions. Students complete 3 sets of problems.
Curated OER
Get a Half-life!
Students explore decay functions and the half-life of a substance. Through an M&M activity with calculators, students collect and graph data. They determine the linear, quadratic and exponential functions of the graph. Students...
Curated OER
Half-Life
In this half-life activity, students are guided through the steps of solving radioactive decay problems. They solve nine problems finding rates of decay, half-life and quantities of substances remaining after given amounts of time.
Curated OER
Working with Half-Life
In this half-life learning exercise, students use a given table of half lives, mass, time and amount of original sample to solve for unknowns in nine given half-life problems.
Curated OER
Demonstrating the Half-Life of a Radioactive Isotope
In this half-life worksheet, students use 100 pennies to simulate radioactive isotopes and half-life. They place the pennies in a box and shake the box. All pennies that turn up tails are removed from the box. They represent the isotopes...
Curated OER
Calculating Half-Life Problems
In this half-life learning exercise, students are given a particular mass of an isotope of cesium and its half life. They are to determine how much cesium will remain after 90 years. They are guided through the problem solving process.
Curated OER
Half-Life Problems
In this half-life worksheet, students calculate the half-life of isotopes, they find masses of isotopes remaining after specified times, and they find particular amounts of time needed to pass for given masses of isotopes to decay.
K-5 Math Teaching Resources
Fraction Strips
Reach out to your visual and kinesthetic learners with this set of printable fraction strips. Not only is this resource a great way to develop children's fractional number sense, it's bound to capture their engagement as well.
Curated OER
Chemistry 142 Exam 1
In this chemistry exam worksheet, students solve fifteen problems related to acids and bases, rates of reactions, and half life.
Curated OER
Fractions: Halves and Quarters of Shapes
In this fractions-halves and quarters of shapes worksheet, students shade in a half or a quarter of each of the 6 different shapes.
Curated OER
Time: hour and half hour
In this time worksheet, students write the time to the hour or half hour for each clock. Students complete 9 problems total on this worksheet.
National Museum of Nuclear Science & History
Nuclear Popcorn
Make your instructional activity on radioactive decay pop with this lab exercise. Using popcorn kernels spread over a tabletop, participants pick up all of those that point toward the back of the room, that is, those that represent...
Curated OER
Making Two-Dimensional Shapes
Which shapes fit? Learners practice visual discrimination using a geometry learning exercise, which has them examine shapes that have been divided in half. They observe a set of shapes to determine which of them would fit into each half...
Curated OER
Making Two-Dimensional Shapes
Find the shapes that fit. Pupils explore visual discrimination in a set of geometry worksheets, which has them examine shapes that have been divided in half. They observe a set of shapes to determine which of them would fit into each...
Curated OER
Harry Potter and the Half-Blood Prince: Study Questions and Essay Topics
In this Harry Potter and the Half-Blood Prince worksheet, students discuss the importance of Harry's past, the role and development of other characters, the role of Quidditch, and predict the future for Hogwarts.
PHET
Alpha Decay
There are different types of radioactive decay, and alpha decay is when there are too many protons in a nucleus. Here is a simulation that shows alpha particles being emitted from a polonium nucleus. Learners see how radioactive decay...
Curated OER
Read the Time: Quarter Hour and Half Hour
In this telling time worksheet, students draw lines to match each analog clock face to the digital clock that says the same time. All times are to the nearest half or quarter hour.
Curated OER
Hours and Half Hours of Time
What time is it? Let your class practice their analog and digital clock skills using this brief worksheet with six visual questions. First, they examine two clocks (one digital and one analog) and write the time in a space below. Next,...
Curated OER
Fractions: One Half of the Whole
In this recognizing halves as fractional parts of wholes worksheet, students identify and shade the figures that are divided in half. Students color and explain 12 answers.
Curated OER
Morning Math
Good morning, math scholars! There are 10 warm-ups here to get your class recalling past concepts and staying sharp on newer ones. Skills include writing an even and odd number sequence, subtracting money amounts, dividing shapes in...
Curated OER
Face Study: Draw the Other Half
Build fine motor, spatial, and drawing skills by having the class complete the other half of a portrait. They choose an image of a face from a magazine, then attempt to draw the other half of the face as accurately as they can. Two book...
Curated OER
Half Man, Half Limping Rabbit
Students explore culture and change through reading "Half Main, Half Limping Rabbit" by Nina Porzucki. In this literature and cultural lesson, students discuss Dracula and other folk stories from Romania. Students identify the ways the...
CK-12 Foundation
Half Angle Formulas: Half-Angle Formulas
Slide the resource into your lesson plans. Young mathematicians use a slider to move a movie screen to the right position for optimal viewing. Along the way, they learn to apply the half angle formulas.
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