• ### Eureka Math – 2nd – Lesson 10

More rectangle building – Let’s draw! In this lesson with Mr. Waldorf, students build on prior skills with concrete square tiles to draw rectangles composed of squares.

• ### Eureka Math – 2nd – Lesson 11

Remove rows from an array – What happens when you remove rows or columns from an array? Join Mr. Waldorf for this lesson that encourages students to decompose rectangles and analyze the remaining rows or columns.

• ### Eureka Math – 2nd – Lesson 12

Splitting up rectangles – Let’s make rectangles! Join Mr. Waldorf for this lesson as students explore different ways to make rectangles using the same number of squares each time. Students will need a pair of scissors.

• ### Eureka Math – 2nd – Lesson 8

Build a rectangle with squares -= Can you build a rectangle using squares? Join Mr. Waldorf for this lesson that encourages students to compose rectangles using square tiles with no gaps or overlaps and relate them to the array model.

• ### Eureka Math – 2nd – Lesson 9

Build a rectangle with rows & columns – How can you use rows and columns to build a rectangle? Join Mr. Waldorf for this lesson that encourages students to relate rectangles composed of square tiles to the array model.

• ### Eureka Math – 2nd – Lesson 7

Repeated addition word problems – Let’s use what we’ve learned to solve word problems! In this lesson, Mr. Waldorf and students will apply their understanding of equal rows and columns and repeated addition. Students will need a whiteboard and marker or pencil and paper.

• ### Eureka Math – 2nd – Lesson 5

Array with equal groups. How can you make an array from a given number of objects? Join Mr. Waldorf for this lesson that encourages students to organize equal groups of objects into arrays either one row or one column at a time.

• ### Eureka Math – 2nd – Lesson 6

Arrays with square tiles. How can we use square tiles to create arrays? Join Mr. Waldorf for this lesson as students compose arrays one row or one column at a time. Students will need up to 25 small square objects as well as a whiteboard and marker or pencil and paper.

• ### Eureka Math – 2nd – Lesson 4

Count groups of a number. How can you use a tape diagram to represent equal groups? Join Mr. Waldorf to understand how numbers other than 1, 10, and 100 can be countable units.

• ### Eureka Math – 2nd Grade – Lesson 1

Split counters into groups. Mr. Waldorf works on splitting counters into groups and shows different ways that numbers can be split into equal groups.