<p> Math Expressions: Common Core MegaMath Links First Grade</p><p>Unit 1 Partners and Number Patterns Through 10 Lesson 1.1 Lesson 1.2 Lesson 1.3 Lesson 1.4 1.5 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Counting Counting Counting Counting Counting Critters Level Critters Level Critters Level Critters Level Critters Level C G G G H Lesson 1.6 Lesson 1.7 Lesson 1.8 Lesson 1.9 Country Country Country Country Countdown: Countdown: Countdown: Countdown: Counting Counting Counting Block Busters Critters Level Critters Level Critters Level Level C H G G Unit 2 Addition and Subtraction Strategies Lesson 2.1 Lesson 2.2 Lesson 2.3 Lesson 2.4 Lesson 2.5 Country Country Numberopolis: Numberopolis: Country Countdown: Countdown: Carnival Carnival Countdown: Block Busters Block Busters Stories Level Stories Level Counting Level A Level A A A Critters Level G Lesson 2.6 Lesson 2.7 Lesson 2.8 Lesson 2.9 Lesson 2.10 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Counting Counting Counting Counting Counting Critters Level Critters Level Critters Level Critters Level Critters Level G G G G H Lesson 2.11 Lesson 2.12 Lesson 2.13 Lesson 2.14 Lesson 2.15 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Counting Counting Counting Counting Counting Critters Level Critters Level Critters Level Critters level I Critters level I H H H Lesson 2.16 Country Countdown: Counting Critters Level U Unit 3 Unknown Numbers in Addition and Subtraction Lesson 3.1 Lesson 3.2 Lesson 3.3 Lesson 3.4 Lesson 3.5 Numberopolis: Numberopolis: Numberopolis: Numberopolis: Numberopolis: Carnival Carnival Carnival Carnival Carnival Stories Level Stories Level Stories Level Stories Level Stories Level E A E A A Lesson 3.6 Lesson 3.7 Lesson 3.8 Lesson 3.9 Lesson 3.10 Numberopolis: Numberopolis: Numberopolis: Country Country Carnival Carnival Carnival Countdown: Countdown: Stories Level Stories Level Stories Level Counting Counting B B B Critters Level Critters Level G M Lesson 3.11 Lesson 3.12 Country Country Countdown: Countdown: Counting Counting Critters Level Critters Level N N Unit 4 Place Value Concepts Lesson 4.1 Lesson 4.2 Lesson 4.3 Lesson 4.4 Lesson 4.5 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Block Busters Counting Block Busters Block Busters Block Busters Level H Critters Level Level G Level G Level G D Lesson 4.6 Lesson 4.7 Lesson 4.8 Lesson 4.9 Lesson 4.10 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Counting Block Busters Counting Block Busters Counting Critters Level Level H Critters Level Level I Critters Level F P P Lesson 4.11 Lesson 4.12 Lesson 4.13 Lesson 4.14 Lesson 4.15 The Number Country Country Country Country Games: Tiny’s Countdown: Countdown: Countdown: Countdown: Think Tank Harrison’s Block Busters Block Busters Block Busters Level A Comparisons Level J Level J Level K Level I Lesson 4.16 Lesson 4.17 Lesson 4.18 Country Country Country Countdown: Countdown: Countdown: Harrison’s Block Busters Block Busters Comparisons Level K Level I Level K Unit 5 Place Value Situations Lesson 5.1 Lesson 5.2 Lesson 5.3 Lesson 5.4 Lesson 5.5 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Block Busters Block Busters Block Busters Block Busters Block Busters Level K Level P Level K Level K Level K Lesson 5.6 Lesson 5.7 Lesson 5.8 Lesson 5.9 Lesson 5.10 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Counting Block Busters Block Busters Block Busters Block Busters Critters Level Level J Level I Level J Level O R Lesson 5.11 Country Countdown: Counting Critters Level R Unit 6 Comparisons and Data Lesson 6.1 Lesson 6.2 Lesson 6.3 Lesson 6.4 Lesson 6.5 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Counting Harrison’s White Water Harrison’s White Water Critters Level Comparisons Graphing Comparisons Graphing C Level D Level A Level D Level E Lesson 6.6 Lesson 6.7 Lesson 6.8 Lesson 6.9 Country Country Country Country Countdown: Countdown: Countdown: Countdown: Harrison’s Harrison’s Harrison’s Harrison’s Comparisons Comparisons Comparisons Comparisons Level D Level D Level D Level D Unit 7 Geometry, Measurement, and Equal Shares Lesson 7.1 Lesson 7.2 Lesson 7.3 Lesson 7.4 Lesson 7.5 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Clock-a- Clock-a- Clock-a- Clock-a- Clock-a- Doodle Doo Doodle Doo Doodle Doo Doodle Doo Doodle Doo Level G Level G Level G Level H Level H Lesson 7.6 Lesson 7.7 Lesson 7.8 Lesson 7.9 Lesson 7.10 Shapes Ahoy: Shapes Ahoy: Shapes Ahoy: Shapes Ahoy: Shapes Ahoy: Ship Shapes Ship Shapes Ship Shapes Ship Shapes Undersea 3D Level G Level G Level R Level K Level F Lesson 7.11 Lesson 7.12 Lesson 7.13 Lesson 7.14 Shapes Ahoy: Shapes Ahoy: Shapes Ahoy: Shapes Ahoy: Undersea 3D Made to Made to Ship Shapes Level F Measure Measure Level R Level A Level D Unit 8 Two-Digit Addition Lesson 8.1 Lesson 8.2 Lesson 8.3 Lesson 8.4 Lesson 8.5 Country Country Country Country Country Countdown: Countdown: Countdown: Countdown: Countdown: Block Busters Block Busters Block Busters Block Busters Block Busters Level K Level M Level M Level M Level M Lesson 8.6 Country Countdown: Block Busters Level M</p>