Curated OER
Pythagorean Theorem
Students solve problems using the Pythagorean Theorem. In this geometry lesson plan, students identify the sides and angles of a right triangle. They find the different trigonometric ratios and solve using sine, cosine and tangent.
Curated OER
Equal Additions
Learners explore the relationships between numbers through the use of "equal addition" and "equal subtraction." Through the use of number sense, they are able to computer addition and subtraction problems mentally. Individually,...
Curated OER
Arithmetic: Revision
Learners practice with a variety of simple equations involving addition, subtraction, multiplication and division. Explanation is followed by each block of equations given to solve. They are set loose to complete additional equations for...
Curated OER
Measuring New Heights
Eighth graders explore the metric system. After a class demonstration, they complete a worksheet on converting metric units. In groups, 8th graders measure their height. They graph the results of the classroom. They convert heights...
Curated OER
Misconceptions in Mathematics: Multiplying Decimals
For this misconceptions about multiplying decimals worksheet, learners read several problems, and common misconceptions about the solutions, then read corrected solutions and complete follow-up exercises.
Illustrative Mathematics
Illustrative Mathematics: 4.nf Using Place Value
Each part of this task highlights a slightly different aspect of place value as it relates to decimal notation. More than simply being comfortable with decimal notation, the point is for students to be able to move fluidly between and...
Lesson Tutor
Lesson Tutor: An Introduction to Decimals
A complete introduction to the decimal system is provided here. Topics included in the discussion/lesson plan are: the meaning of and need for decimals, a place value chart, tips to help remember how and when to move the decimal point,...
Better Lesson
Better Lesson: Moving From Fractions to Decimals
Introduce students to decimals with this lesson. Students will explore how fractions can be changed to decimals with place value charts.
CK-12 Foundation
Ck 12: Elem Math: Expressing Decimals in Thousandths
[Free Registration/Login may be required to access all resource tools.] The video describes how to express a number in thousandths by moving the decimal to the right. The video is followed by additional problems for students to practice...
CK-12 Foundation
Ck 12: Elem Math: Expressing Decimals in Tenths
[Free Registration/Login may be required to access all resource tools.] The video describes how to express a number in tenths by moving the decimal to the right. The video is followed by additional problems for students to practice the...
CK-12 Foundation
Ck 12: Elem Math: Expressing Decimals in Hundredths
[Free Registration/Login may be required to access all resource tools.] The video describes how to express a number in hundredths by moving the decimal to the right. The video is followed by additional problems for students to practice...