Vocabulary Acquisition: The Research
Readers must understand 90-95% of the words in a text to comprehend it. (Nagy & Scott) Vocabulary development is the lifelong process of acquiring new words and understanding their meanings to cummunicate and comprehend effectively.
Task:
Most muscles work in pairs. Muscles only pull on bone; they cannot push. As your muscles pull on bone, they contract, or get shorter. In order to relax, or length, muscles need to partner to pull the bone in the opposite direction. Paired muscles never pull at the same time. One pulls, the other relaxes. One relaxes, the other pulls.
Look at this picture of the muscles in your upper arm. It shows what happens when you make a fist and bend your arm. The bicep muscle contracts and bends your elbow while your tricep muscle relaxes. When you straighten your arm out again, your tricep muscle contracts and your bicep muscle relaxes. By working in pairs, taking turns pulling on your bones, skeletal muscles enable you to ride your bike, play the guitar, or climb a mountain.
Skeletal muscles come in all sorts of shapes and sizes - fat and skinny, long and circular. Because you control your skeletal muscles, decided when and how you want to move your bones, they are called voluntary muscles. The movement does not happen automatically. You make a conscious decision to move the muscles attached to your bones.
Consider how your comprehension deepens as you read the excerpt:
Step 1: Read sample 1
Step 2: Click here to read sample 2
Step 3: Click here to summarize your findings
Findings
In Sample 1, you were unable to read or understand 90–95% of the words in the passage, which significantly limited your ability to comprehend the overall text. This contrast is highlighted in Sample 2, where you were able to understand 90–95% of the words, leading to much stronger comprehension. This illustrates that vocabulary development is a critical component in supporting students’ access to complex texts and promoting deeper levels of understanding.
Vocabulary Acquisition: The Research
Megan Sopha
Created on April 10, 2026
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Transcript
Vocabulary Acquisition: The Research
Readers must understand 90-95% of the words in a text to comprehend it. (Nagy & Scott) Vocabulary development is the lifelong process of acquiring new words and understanding their meanings to cummunicate and comprehend effectively.
Task:
Most muscles work in pairs. Muscles only pull on bone; they cannot push. As your muscles pull on bone, they contract, or get shorter. In order to relax, or length, muscles need to partner to pull the bone in the opposite direction. Paired muscles never pull at the same time. One pulls, the other relaxes. One relaxes, the other pulls. Look at this picture of the muscles in your upper arm. It shows what happens when you make a fist and bend your arm. The bicep muscle contracts and bends your elbow while your tricep muscle relaxes. When you straighten your arm out again, your tricep muscle contracts and your bicep muscle relaxes. By working in pairs, taking turns pulling on your bones, skeletal muscles enable you to ride your bike, play the guitar, or climb a mountain. Skeletal muscles come in all sorts of shapes and sizes - fat and skinny, long and circular. Because you control your skeletal muscles, decided when and how you want to move your bones, they are called voluntary muscles. The movement does not happen automatically. You make a conscious decision to move the muscles attached to your bones.
Consider how your comprehension deepens as you read the excerpt:
Step 1: Read sample 1
Step 2: Click here to read sample 2
Step 3: Click here to summarize your findings
Findings
In Sample 1, you were unable to read or understand 90–95% of the words in the passage, which significantly limited your ability to comprehend the overall text. This contrast is highlighted in Sample 2, where you were able to understand 90–95% of the words, leading to much stronger comprehension. This illustrates that vocabulary development is a critical component in supporting students’ access to complex texts and promoting deeper levels of understanding.