Students use interlocking cubes to learn to: count quantities up to ten; find two numbers that combine to make ten; and add using concrete materials.

Kindergarten, Operational Sense

In this lesson students use tiles and cubes to: estimate quantities; count sets of objects; group sets of objects into tens; and compare quantities using the terms more, less, and equal.

Kindergarten, Quantity

In this lesson students count by fives, recognize and describe skip-counting patterns; represent skip counting graphically, concretely, and symbolically; and use skip counting to solve problems.

The lesson can be found at this link:

Grade 1, Counting and Representation

Students use counters to decompose a number into two parts; identify a missing part of a number; and describe part-part-whole relationships.

Grade 1, Number Relationships

In this lesson students use interlocking cubes to find two numbers that combine to make 10; add numbers using concrete materials; and record addition number sentences.

Grade 1, Operational Sense

Cubes, tiles, and ten frames are used in this lesson to help students learn about estimating quantities, grouping and counting quantities by 10’s, recognizing quantities in relation to 10, and comparing quantities using the terms more, less, and equal.

Grade 1, Quantity

Students use base-ten blocks and a number cube to learn about counting and representation in this lesson. The overall objectives covered are: represent two- and three-digit numbers, count by 100’s, 10’s, and 1’s, trade 10 ones for a 10 and ten 10s for a hundred, and compare numbers.

Grade 2, Counting and Representation

In this lesson students use number lines to improve their skills related to operations.

Grade 2, Operational Sense

In this lesson students use estimation to learn about fractions.

Grade 2, Quantity