## Phonics

Prefixes Level 4 Vol. 1 – This free fourth-grade phonics lesson teaches students the meanings of common prefixes such as re-, un-, dis-, and sub-. Students combine prefixes with root words to make words with specific meanings. Since prefixes give meaning to thousands of words, this is a crucial foundational reading skill for any fourth-grade reader.

## Geometry

2D Shapes, Transformations Level 4 Vol. 1 – This free geometry lesson helps children practice the concepts of transformations through a problem-solving game. Students must recognize, apply, and predict the result of translations or slides and rotations or turns. The game environment, geometric vocabulary, and exploratory approach in this lesson will help deepen your children’s understanding of two-dimensional space.

## Measurement

Measurement Tools Length Level 4 Vol. 1 – Help your children learn to use a ruler to measure with this free measurement lesson. Students use virtual rulers with inches and centimeter units. Interactive tools allow the student to select their units, rotate their ruler, and drag to measure objects of various lengths. Answers are reported to the fraction of an inch or centimeter. This real-world skill is a must!

## Number and Operations

Problem Solving, Addition and Subtraction with Decimals Level 4 Vol. 1 – In this free number and operation lesson, your children will help Omar check his receipts and solve addition and subtraction problems with decimals. Students first, estimate if the receipt total is correct or incorrect using mental math. If the receipt has errors, they may use a calculator to make the corrections.  This is a not only a foundational skill, but also a fun way to practice mental math and real-world calculations.