Curated OER
Astronomical Scales
Young scholars describe the different units of measurement. In this space science lesson, students calculate astronomical distances using a scale. They explain the significance of using scientific notation in expressing very small or...
Curated OER
Menu Mania
Students explore the concept of estimating by watching a video, and discussing the strategies for estimation. They estimate the costs for various menu items, then calculate the exact amount spent.
Khan Academy
Khan Academy: Visually Compare Fractions 1
Practice comparing fractions with the help of visuals aides. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.NF.A.2.b Represent a fraction a/b...
Khan Academy
Khan Academy: Compare Fractions With the Same Numerator
Compare two fractions that have the same numerator using greater and less than symbols. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints....
Khan Academy
Khan Academy: Compare Fractions of Different Wholes
Compare two fractions based on the whole that each one refers to. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.NF.A.2.b Represent a fraction...
E-learning for Kids
E Learning for Kids: Math: Bus Station: Fractions (Halves)
Students will complete learning games to practice fractions.
PBS
Pbs Learning Media: Area Models for Multiplication of Fractions
An interactive for investigating what fraction multiplication looks like. Students choose two fractions to multiply, then observe as one fraction bar model is overlaid on the second, showing the common grid area as the product. Students...
Illustrative Mathematics
Illustrative Mathematics: Finding Common Denominators to Subtract
Part (a) of this task asks students to use two different denominators to subtract fractions. The purpose of this is to help students realize that any common denominator will work, not just the least common denominator. Part (b) does not...
Illustrative Mathematics
Illustrative Mathematics: Finding Common Denominators to Add
Part (a) of this task asks young scholars to find and use two different common denominators to add the given fractions. The purpose of this question is to help students realize that they can use any common denominator to find a solution,...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving a Ratio With & Without a Diagram
A student is searching for a solution to a ratio question without using a diagram. Dr. Math helps to break it down both with and without a diagram. An understanding of fractions, multiplication, and basic algebra is necessary to get this...
National Council of Teachers of Mathematics
Nctm: Figure This: Grape Juice Jungle
Are all juice grape juice concentrates the same? Find out when you explore ratio and fractions in this math challenge that compares juice recipes to identify strongest taste. A one page activity from the NCTM Math Challenges for Families...