## How to Use the Materials

### Each Lesson and Unit Tells a Story

- the mathematical content of the lesson and its place in the learning sequence
- the meaning of any new terms introduced in the lesson
- how the mathematical practices come into play, as appropriate

- the mathematical purpose of the activity and its place in the learning sequence
- what students are doing during the activity
- what the teacher needs to look for while students are working on an activity to orchestrate an effective synthesis
- connections to the mathematical practices, when appropriate

### Launch - Work - Synthesize

Each classroom activity has three phases.

**Launch**

During the launch, the teacher makes sure that students understand the context (if there is one) and what the problem is asking them to do. This is not the same as making sure the students know how to do the problem—part of the work that students should be doing for themselves is figuring out how to solve the problem. The launch invites students into the lesson and helps them connect to contexts that may be unfamiliar.

**Student Work Time**

The launch for an activity frequently includes suggestions for grouping students. This gives students the opportunity to work individually, with a partner, or in small groups.

**Activity Synthesis**

During the activity synthesis, the teacher orchestrates some time for students to synthesize what they have learned. This time is used to ensure that all students have an opportunity to understand the mathematical punch line of the activity and situate the new learning within students’ previous understanding.

### Practice Problems

Each section in a unit includes an associated set of practice problems. There are 3 types of practice problems: pre-unit, lesson, and exploration. Teachers may decide to assign practice problems for homework or for extra practice in class. They may decide to collect and score them or to provide students with answers ahead of time for self-assessment. It is up to teachers to decide which problems to assign (including assigning none at all).

**Pre-unit Problems**

The practice problem set associated with the first section of each unit includes several prior grade-level questions. These questions can be used to review prerequisite material from the previous grade or as a pre-unit assessment, if desired.

**Lesson Practice Problems**

The practice problem set associated with each section typically includes one question for each lesson in the section.

**Exploration Problems**

Each practice problem set also includes exploration questions that provide an opportunity for differentiation for students ready for more of a challenge. There are two types of exploration questions. One type is a hands-on activity directly related to the material of the unit that students can do either in class if they have free time, or at home. The second type of exploration is more open-ended and challenging. These problems go deeper into grade-level mathematics. They are not routine or procedural, and they are not just “the same thing again but with harder numbers.”

Exploration questions are intended to be used on an opt-in basis by students if they finish a main class activity early or want to do more mathematics on their own. It is not expected that an entire class engages in exploration problems, and it is not expected that any student works on all of them. Exploration problems may also be good fodder for a Problem of the Week or similar structure.

### Instructional Routines

Instructional Routines are designs for interaction that invite all students to engage in the mathematics of each lesson. They provide opportunities for students to bring their personal experiences as well as their mathematical knowledge to problems and discussions. They place value on students’ voices as they communicate their developing ideas, ask questions, justify their responses, and critique the reasoning of others.

As mentioned in the Design Principles, instructional routines have a predictable structure and flow. They provide structure for both the teacher and the students. A finite set of routines support the pacing of lessons as they become familiar and save time in classroom choreography, so students can spend less time learning how to execute lesson directions, and more time on learning mathematics. Some of the instructional routines, known as Mathematical Language Routines (MLRs), were developed by the Stanford University UL/SCALE team.

There are two types of Instructional Routines used in the materials: Warm-up Routines and Lesson Activity Routines. A list of the routines within each type is outlined in this table.

Warm-up Routines | Lesson Activity Routines |
---|---|

Act It Out | Math Language Routines (MLRs) |

Choral Count | MLR1: Stronger and Clearer Each Time |

Estimation Exploration | MLR2: Collect and Display |

How Many Do You See? | MLR3: Clarify, Critique, Correct |

Notice and Wonder | MLR4: Information Gap |

Number Talk | MLR5: Co-craft Questions |

Questions About Us | MLR6: Three Reads |

True or False? | MLR7: Compare and Connect |

What Do You Know About _____? | MLR8: Discussion Supports |

Which One Doesn’t Belong? | Other Lesson Activity Routines |

5 Practices | |

Card Sort |

Each lesson begins with a Warm-up Routine intentionally designed to elicit student discussions around the mathematical goal of the lesson. The Lesson Activity Routines embed structures within the tasks of the lessons that allow students to engage in the content, and collaborate in ways that support the development of student thinking and precision with language. MLRs are written into each lesson, either as an embedded structure of a lesson activity in which all students engage, or as a suggested optional support specifically for English learners.

Below is a list of each routine with a brief description of its purpose.

### Center Overview

Centers are intended to give students time to practice skills and concepts that are developed across the year. There are 2 types of centers.** **Addressing centers address the work of a lesson or section of a unit. Supporting centers review prior unit or prior grade-level understandings and fluencies.

Each center builds across multiple stages that may span several grades. For example, Get Your Numbers in Order, a center in which students use their understanding of relative magnitude to order numbers, has 5 stages that span grades 1–5. Center stages are aligned to Common Core standards and in grades 2–5, suggested centers are included in each lesson. These centers build towards the content in a lesson or section, develop fluency across that grade level, or preview content for an upcoming unit. In kindergarten and grade 1, centers are an integral part of the lessons, so additional suggested centers are not included in each lesson. Note: Early center stages in kindergarten may be building toward the aligned kindergarten grade-level standards.

**Structure of Center Time**

In kindergarten and grade 1, center time is built into lessons so that students have a chance to spend more time on topics that require more time to develop understanding. New centers are introduced during this time and students are given a choice to work on previously introduced centers.

In grades 1 and 2, there is a center day at the end of each section of each unit. In grade 2, these lessons are optional. In these lessons, new centers are introduced and students also have time to choose between previously introduced centers that reinforce content from the unit or build grade-level fluencies.

In grades 3–5, center time is in addition to regular class time, as desired by the teacher. Optional center day lessons are included occasionally in a unit to introduce a center to students, but in general centers are provided as an extra resource for teachers.

Centers can be used in a variety of additional ways. Students can work on centers if a lesson is completed and there is class time remaining. Entire class sessions can also be dedicated to centers for students to practice or solidify the mathematical ideas of a unit. Students can work on center activities during morning work time, or any other free periods throughout the day. Centers can also be used as support for students when practice with prior grade-level standards is needed.