This is a game-based learning math lesson for 1st grade that deepens conceptual understanding of comparing two two-digit numbers and has students use the symbols associated with comparison (>, =, <).

This short video and interactive assessment activity is designed to teach first graders about selecting the correct addition sentence (sums to 100).

This site features a video overview of Addition (Sums to Twenty) for 1st Graders.

This video and accompanying interactive assessment practice was designed to teach completing the subtraction sequence to first graders.

This short video and interactive assessment activity is designed to teach first graders an overview of rectangles, squares, circles and triangles.

This is a video and assessment exercise aimed at helping first graders identify incorrect subtraction.

This course features a video review and an interactive assessment activity for selecting the correct addition sequence. It is aimed at first graders.

This short video and interactive assessment activity is designed to teach first graders an overview of quarter-circles and semi-circles.

This short video and interactive assessment activity is designed to teach first graders about single object length (english measurent).

This short video and interactive assessment activity is designed to teach first graders about how big is a meter?.

This short video and interactive assessment activity is designed to teach first graders an overview of subtraction (numbers to 100).

This video lecture serves as a review of subtraction up to the number twenty for first graders.

This short video and interactive assessment activity is designed to teach first graders an overview of telling time to quarter and hour.

This is a video and interactive assessment activity designed to help first graders learn about subtraction word problems up to twenty.

This video and accompanying interactive assessment practice was designed to teach Two-step Subtraction (Numbers to 100) - Word Problems to first graders.

This course features a video review and an assessment practice of subtracting by crossing out with pictures for word problems. It is aimed at first grade math students.

This problem helps students practice adding three numbers whose sum are 20 or less.

This is a lesson plan that will help educators teach Kindergarten students about 2D and 3D shapes, how to identify, sort them and design their own using marshmallows and toothpicks. Assessments and Rubrics are included to assess students on identifying, sorting, and designing 2D and 3D shapes.The image used in the Image Title was a screen shot taken from the Youtube Assessment that is linked to the lesson plan. It is Titled "2D or 3D Shapes: Under the Sea Math Brain Break"  by Move and Groove Math It is licensed under CC BY-SA 4.0 

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: * Color the inside of all the triangles blue. * Color the inside of all the quadrilaterals red. * Color the inside of all the pentagons orange. * Color...

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Materials * Alexander, Who Used to be Rich Last Sunday by Judith Viorst * Plastic coins * Labels for items Alexander spent his money on (attached) * Pa...