Texas TEKS 2.1.E

Science2nd GradeScientific and engineering practices

The Standard

collect observations and measurements as evidence

Texas Essential Knowledge and Skills for Science

Teacher's field guide

What Students Need to Do: Students notice specific details and use tools to gather numbers, such as length, temperature, time, or count. They record the information and use it to answer a question or support a claim.
What Mastery Looks Like: A student chooses a suitable tool, measures carefully, and includes labels or units. The student points to a recorded detail or number when explaining a conclusion.
Common Misconceptions: Students may record opinions, such as “pretty,” instead of observable details. They may guess measurements, forget units, or make a claim that does not match their evidence.
How to Assess It: Give each student a leaf and ruler. Ask them to record two visible details and its length, then write one claim supported by those records.

Lesson moves

Place ice cubes in two locations, then have students record size measurements and visible changes every five minutes.
Ask students to write which classroom object is longest and cite two measurements that support their answer.
Play Evidence Match by having students pair claim cards with observation or measurement cards that support each claim.
Measure playground surface temperatures in sun and shade, then use the results to recommend where students should sit.

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