National Math + Science Initative
Introduction to Decimals
Three activities make up an introductory lesson designed to create a strong foundation in comparing fractions to decimals and exploring and building decimal models. Pupils brainstorm and complete a Venn diagram to show how decimals and...
EngageNY
Percent and Rates per 100
What percentage of your class understands percents? Pupils learn the meaning of percents based upon rates per 100 in the 24th lesson in a series of 29. They represent percents as fractions, decimals, ratios, and models. The scholars...
Curated OER
Rounding Decimals
Fourth graders engage in a lesson that is about the concept of rounding decimals. They review place value and focus it upon the practice of rounding. Students use 10 base decimal grids or models to help make connections with the skill.
Curated OER
Grid and Percent It
Students explore percent. In this percent lesson, students investigate how to represent percentages on a hundreds grid. Working independently, students solve mathematical problems involving percentages.
Curated OER
Comparing and Ordering Fractions, Mixed Numbers, and Decimals
Learners practice comparing and ordering fractions, mixed numbers, and decimals. In this fractions, mixed numbers, and decimals instructional activity, students examine a decimal place value chart compared to a whole number place value...
Curated OER
Decimal Models
Before jumping into numeral decimals, explore them visually using this base 10 strategy. There is a set of examples to help scholars understand the concept. They color in grids to represent decimals written in a variety of ways. Some...
Curated OER
Fractions and Grids
Third graders utilize a grid to help them think of different names for the same fraction. They practice solving practical problems that require finding fractions of whole numbers and decimal amounts and list several different names for...
Curated OER
Number Line Mathematics
Students translate problem situations into diagrams, models, and numerals using whole numbers, fractions, mixed numbers, decimals, and percents. They identify that numbers in different forms are equivalent or not equivalent using whole...
Curated OER
It's Close Enough: Rounding and Estimation
Second graders round to the closest five, ten, and hundred. They use place-value concepts of grouping based upon powers of ten (thousandths, hundredths, tenths, ones, tens, hundreds, thousands) within the decimal number system.
Curated OER
Perfect Places!
Second graders study the decimal point and study tenths, hundredths, and thousandths. They explain ways to read and write decimals.
Curated OER
Math: It's About Patterns
Fourth graders discover place value patterns through various games and readings and record their findings in journals. In pairs, they use manipulatives such as place value tents and digit cards to drill and practice writing numbers in...
Curated OER
Number in Geometry
Students use a number line to assist with their additions. They use a calculator to check for factors. Students are taught factors and multiples. They use array model of multiplication to define meaning. Students develop a wide range of...
CK-12 Foundation
Ck 12: Arithmetic: Area Models for Decimal Multiplication
[Free Registration/Login may be required to access all resource tools.] Find the product of two decimals using area models.