Mississippi Math A3.N.2
The Standard
Evaluate and apply formulas for arithmetic and geometric sequences and series.
2025 Mississippi College- and Career-Readiness Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students tell whether a pattern grows by adding the same amount or multiplying by the same number. They use formulas to find a later term or the total of a set number of terms.
What Mastery Looks Like
- Students can choose the right formula, find the eighth term and sum of the first eight terms, and show their work. They can explain whether their answer is one term or a total.
Common Misconceptions
- Students may look for an amount added each time when the terms actually multiply. They may count eight steps instead of seven when finding the eighth term, or give the eighth term when asked for the total of eight terms.
How to Assess It
- Exit ticket: For 4, 7, 10, 13 and 3, 6, 12, 24, find the eighth term and sum of the first eight terms of each. Show the formulas you used.
Lesson moves
Ways to Teach It
Use counters to build 2, 5, 8, 11 and 2, 4, 8, 16; record each pattern's next term and total.
Ask: Why do 2, 5, 8, 11 and 2, 4, 8, 16 need different sum formulas?
Deal cards marked 'first term 4, difference 3' or 'first term 4, ratio 3'; partners find term six and sum six.
Compare weekly deposits starting at $10, increasing by $5 or doubling; find each plan's sixth deposit and six-week total.
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Printable A3.N.2 Worksheet
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