Grade 1 Mathematics Weeks 19–20: Student Textbook
Ten lessons with concrete models, guided reasoning, and independent application. Use counters, base-ten blocks, equal-size cubes, paper clocks, and drawings as appropriate.
Week 19: Length and comparison
Day 91: Measure in cubes
Learn: Subtract the lengths in matching units.
Example: One strip measures 12 equal-size cubes and another 7. How many cubes longer is the first? Explain the answer using objects or a drawing.
Guided question: One strip measures 13 equal-size cubes and another 8. How many cubes longer is the first?
Day 92: Compare ribbons
Learn: Subtract the lengths in matching units.
Example: One strip measures 15 equal-size cubes and another 9. How many cubes longer is the first? Explain the answer using objects or a drawing.
Guided question: One strip measures 16 equal-size cubes and another 10. How many cubes longer is the first?
Day 93: Order lengths
Learn: Compare tens, then ones.
Example: Compare 8 and 13: which is greater? Explain the answer using objects or a drawing.
Guided question: Compare 9 and 14: which is greater?
Day 94: Same-size units
Learn: Subtract the lengths in matching units.
Example: One strip measures 10 equal-size cubes and another 6. How many cubes longer is the first? Explain the answer using objects or a drawing.
Guided question: One strip measures 11 equal-size cubes and another 7. How many cubes longer is the first?
Day 95: Measurement checkpoint
Learn: Subtract the lengths in matching units.
Example: One strip measures 17 equal-size cubes and another 8. How many cubes longer is the first? Explain the answer using objects or a drawing.
Guided question: One strip measures 18 equal-size cubes and another 9. How many cubes longer is the first?
Week 20: Time and data
Day 96: Hour
Learn: Minute hand points to 12.
Example: Write 4:00 in words. Explain the answer using objects or a drawing.
Guided question: Write 5:00 in words.
Day 97: Half hour
Learn: Minute hand points to 6.
Example: Write 7:30 in words. Explain the answer using objects or a drawing.
Guided question: Write 8:30 in words.
Day 98: Count tally marks
Learn: Use counters or make a ten.
Example: 8 + 5 = ___ Explain the answer using objects or a drawing.
Guided question: 9 + 6 = ___
Day 99: Read category data
Learn: Subtract the lengths in matching units.
Example: One strip measures 9 equal-size cubes and another 6. How many cubes longer is the first? Explain the answer using objects or a drawing.
Guided question: One strip measures 10 equal-size cubes and another 7. How many cubes longer is the first?
Day 100: Data checkpoint
Learn: Subtract the lengths in matching units.
Example: One strip measures 12 equal-size cubes and another 7. How many cubes longer is the first? Explain the answer using objects or a drawing.
Guided question: One strip measures 13 equal-size cubes and another 8. How many cubes longer is the first?