6.1.C
Math6th Grade
The Standard
select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems
Texas Essential Knowledge and Skills for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students decide whether to use objects, drawings, paper and pencil, a calculator, mental math, or estimation for a problem. They use the chosen method and explain why it fits.
What Mastery Looks Like
- Students choose a tool or technique that matches the numbers, the question, and the needed level of accuracy. They solve correctly and explain why their choice was efficient.
Common Misconceptions
- Students may choose a calculator for every problem, even when mental math is faster. They may confuse an estimate with an exact answer or select a tool without explaining why it fits.
How to Assess It
- Exit ticket: Notebooks cost $2.79 each. Estimate, then find the exact cost of 14 notebooks, name the tool or technique used, and explain why.
Lesson moves
Ways to Teach It
Set out counters, fraction strips, graph paper, and calculators; students solve three problems and place a tool card beside each solution.
Ask students to write: Which method was fastest, which was most accurate, and when would an estimate be enough?
Play Tool Match: teams draw a problem card, choose a tool or technique, solve, and earn a point for a sound justification.
Give a grocery flyer and a $30 budget; students choose estimation or exact calculation to build a cart and check the total.
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