Pre-K-2
This lesson builds on the previous two lessons and encourages students
to explore another model for addition, the set model. This model is
similar to the counting model in the first lesson, because it is based
on counting. Reading a related counting and addition book sets the
stage for this lesson in which students write story problems, find sums
using sets, and present results in the form of a table. In the
discussion of the table, the students focus on the order property and
the effects of adding 0.
Pre-K-2
A children’s book sets the stage for this lesson which encourages students to review counting back. In this lesson, children write subtraction problems and model them with cubes. They compare sets and record differences in the form of a table. The additive identity is reviewed in the context of comparing equal sets.
Pre-K-2
Students explore subtraction in the comparative mode by answering questions of “How many more?” and “How many less?” as they match sets of buttons. They also make and discuss bar graphs based on the number of buttons they are wearing.
Pre-K-2
Students build on prior knowledge of sorting and classifying when they recognize sorts and name rules for sorting. They identify common properties in the classroom environment and make, explain, and defend conjectures to extend their knowledge.
Pre-K-2
Help the alien spaceship move cows into corrals by counting, adding, and
subtracting. This activity helps children learn grouping, tally marks,
and place value.
Pre-K-2, 3-5
Use counting strategies to make outfits for Bobbie Bear with different colored shirts and pants.
Click here to play Bobbie Bear in Spanish.
Pre-K-2
This lesson focuses on elements that constitute a pattern core or unit. Identifying the core element or unit that is repeated is a necessary early concept that students must understand to recognize and create repeating patterns.
Pre-K-2
Use
logical thinking to create, identify, extend, and translate patterns.
Pre-K-2
Explore the take away model of
subtraction in several different contexts (counting, sets, number line,
balanced equations, and inverse of addition) using pasta shapes.
Pre-K-2
Explore four models of addition (counting,
number line, sets, and balanced equations) using dominoes.
