## Lesson Highlights

## Newest Lessons

### Sickle Cell Anemia Inheritance

6-8, 9-12

In this lesson,
students explore the concept of genetics and inheritance. The lesson focuses on
sickle cell anemia, a genetic disease that is dependent on a recessive
trait. Students will perform data collection and analysis of the probability
of a child of two sickle trait parents inheriting sickle cell anemia. To do
this, they play a game that models how the inheritance of a disease works from
parents’ genes. Later, students construct family trees with probability to
determine the genotypes of family members.### Begin With Buttons

Pre-K-2

In this unit, students use buttons to explore logical and numerical
relationships. The unit begins with two lessons that focus on the two
basic logical thinking skills, classification and seriation, which are
the foundation for understanding numbers and number relationships. These
abilities in turn form the basis for understanding addition and
subtraction. In the next six lessons, students explore the relationships
between numbers and model addition and subtraction sentences with
buttons.### Comparing Connecting Cubes

Pre-K-2

In this unit, students explore five models of subtraction (counting,
sets, number line, balanced equations, and inverse of addition) using
connecting cubes. The lessons focus on the comparative mode of
subtraction. In them, children explore the relationship between addition
and subtraction, write story problems in which comparison is required,
and practice the subtraction facts.### Do It with Dominoes

Pre-K-2

In this unit , students explore four models of addition (counting,
number line, sets, and balanced equations) using dominoes. They also
learn about the
order (commutative) property, the relation between addition and
subtraction, and the result of adding 0. Students also write story
problems in which the operation of
addition is required and begin to memorize the addition facts. In this
unit, students also investigate properties of addition and represent
addition in pictures.### Food Pyramid Power

Pre-K-2

In this unit, students use algebraic thinking to explore properties of
addition. The food pyramid is the starting point for these explorations.
Students’ ability to classify forms the basis of algebraic thinking. In
this unit, students explore sorting and patterning and apply these
logical processes to the operation of addition in the set model. They
also construct sets of a given number and find missing addends.