About this book
Line it up, lay it out, read the ruler.
Four short modules take young learners from lining up two pencils to reading a centimeter ruler and making smart estimates. Every module follows the same seven LessonCrest steps, with help that fades as confidence grows.
- Compare and order lengths by lining up the ends
- Measure with equal units: no gaps, no overlaps
- Read a centimeter ruler from 0, and when the start is not 0
- Estimate with a benchmark, then measure to check
- Simple length stories: how much longer, how long together
- Review pages, an exit check and answers that explain why
Look inside
What this book covers
Covered
What this book covers: comparing and ordering lengths, measuring with equal units (paper clips and cubes), reading a centimeter ruler from zero, estimating, and length stories, plus a first look at meters, inches and feet.
Not covered
Not covered here: converting between units (only 1 m = 100 cm and 1 foot = 12 inches are mentioned), and half units.
Before you start, you should be able to
- Tell which of two things is longer.
- Count up to 10 things.
- Line up two things at one end.
Things to have
Real paper clips, cubes and a centimeter ruler help a lot.
Notice
Pictures in this book are simplified learning models. Check answers with the explanations at the back of the book.
The steps in this book
- Step 1: Get Ready
Check the skills you need before you begin. If something feels tricky, an adult can help you start in the right place.
- Step 2: Learn It
Read a short, clear explanation of the new idea and the words that go with it.
- Step 3: See It
Watch the idea being used, one step at a time, in a worked example.
- Step 4: Try It Together
Practice with prompts and help cues. The help gets smaller as you get stronger.
- Step 5: On Your Own
Practice on your own with different kinds of questions, and explain your thinking.
- Step 6: Look Back
Look back at earlier learning so it stays strong, then check where to go next.
- Step 7: Check and Fix
Check your answers. Each answer explains why, names a common mistake, and shows how to fix it.
What is in the book
The modules
- Module 1: Compare and order lengthsPages 5–14
- Module 2: Iterate equal unitsPages 15–24
- Module 3: Read marked rulersPages 25–34
- Module 4: Estimate and solve length problemsPages 35–44
Contents
- Readiness check, pp. 3–4. Before Module 1. Its table tells you where to start.
- Modules, pp. 5–44
- Checkpoints, pp. 14, 24, 34, 44. The last page of each module.
- Mixed review, pp. 45–48. Questions from across the book, mixed together.
- Exit check, pp. 49–50. A last check across the book.
- Reflect and repair, p. 51
- Try again, p. 52. Fresh questions like those in the exit check.
- Further practice, pp. 53–56. More pages of step 5, On Your Own.
- Extra practice, pp. 57–62
- Answers and explanations, pp. 63–70. Notes in this part are headed “Why”, “Common mistake”, “Help” and “Look for”.