A 12-week math class for kindergarten students based on Common Core math standards is a great way to help young learners develop essential math skills. Below is a comprehensive plan with three sessions per week, focusing on key math concepts and skills aligned with the Common Core standards for kindergarten:

**Weeks 1-4: Counting and Cardinality**
*Session 1: Introduction to Numbers*
- Objective: Recognize and write numbers 0-10.
- Activities: Counting objects, tracing numbers, number identification games.

*Session 2: Counting and One-to-One Correspondence*
- Objective: Counting objects accurately and understanding one-to-one correspondence.
- Activities: Counting various objects, number songs, interactive counting games.

*Session 3: Understanding Number Order*
- Objective: Sequencing numbers from 0 to 10.
- Activities: Number sequencing exercises, number puzzles, number line exploration.

**Weeks 5-8: Operations and Algebraic Thinking**
*Session 4: Introduction to Addition*
- Objective: Understanding addition as putting together.
- Activities: Addition with objects, visual addition problems, addition stories.

*Session 5: Introduction to Subtraction*
- Objective: Understanding subtraction as taking apart.
- Activities: Subtraction with objects, visual subtraction problems, subtraction stories.

*Session 6: Addition and Subtraction Fluency*
- Objective: Develop fluency in basic addition and subtraction facts within 5.
- Activities: Flashcards, math fact drills, and simple addition/subtraction games.

**Weeks 9-12: Measurement and Data**
*Session 7: Introduction to Measurement*
- Objective: Understanding and comparing the length, height, and weight of objects.
- Activities: Measuring with non-standard units, comparing sizes, and discussing concepts of longer/shorter, taller/shorter, heavier/lighter.

*Session 8: Introduction to Shapes and Geometry*
- Objective: Recognize and describe basic shapes (e.g., square, circle, triangle, rectangle).
- Activities: Shape recognition games, sorting shapes, and building with shapes.

*Session 9: Data Analysis and Graphing*
- Objective: Collecting and organizing data in simple graphs.
- Activities: Creating and interpreting bar graphs and pictographs using everyday data.