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Math 9th Grade Ages 14–15
Data, regression and interpreting a model — Take-Home — 9th Grade Fits a line to real data, interprets the parameters, and knows the limits of the fit. This one-page 9th Grade take-home carries the two-minute check that tells you whether the skill is wobbly, then "Fit It and Break It" — 30 minutes with real data set, a spreadsheet or calculator — plus what to say…
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Data, regression and interpreting a model MATH · 9TH GRADE Name Date TAKE-HOME PRACTICE Math · 9th Grade 30 minutes WHAT THIS BUILDS Fits a line to real data, interprets the parameters, and knows the limits of the fit. 1 THE TWO-MINUTE CHECK ASK "What does r = 0.8 tell you? What does it not tell you?" A SOLID ANSWER Strong positive association, and explicitly not causation, nor validity outside the data range. Not yet Getting there Solid 2 FIT IT AND BREAK IT You need: Real data set, A spreadsheet or calculator Collect or find a real paired data set of at least twenty points. Plot it, fit a line, and record the equation and r. Interpret the slope in real units. Predict a value inside the data range and one far outside it, and discuss which is defensible. Remove one outlier and refit — see how much the model moves. SAY THIS WHEN IT STALLS "That prediction is thirty years past your data. On what basis do you believe it?" Fit by eye and interpret the slope. Compare a linear and an exponential fit to the same data and argue for one. IF IT'S TOO HARD IF IT'S TOO EASY Did it M T W T F Full year of take-homes: www.littleactivity.com/takehome/grade-9 www.littleactivity.com 9th Grade · Math
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Data, regression and interpreting a model MATH · 9TH GRADE Name Date TAKE-HOME PRACTICE Math · 9th Grade 30 minutes WHAT THIS BUILDS Fits a line to real data, interprets the parameters, and knows the limits of the fit. 1 THE TWO-MINUTE CHECK ASK "What does r = 0.8 tell you? What does it not tell you?" A SOLID ANSWER Strong positive association, and explicitly not causation, nor validity outside the data range. Not yet Getting there Solid 2 FIT IT AND BREAK IT You need: Real data set, A spreadsheet or calculator Collect or find a real paired data set of at least twenty points. Plot it, fit a line, and record the equation and r. Interpret the slope in real units. Predict a value inside the data range and one far outside it, and discuss which is defensible. Remove one outlier and refit — see how much the model moves. SAY THIS WHEN IT STALLS "That prediction is thirty years past your data. On what basis do you believe it?" Fit by eye and interpret the slope. Compare a linear and an exponential fit to the same data and argue for one. IF IT'S TOO HARD IF IT'S TOO EASY Did it M T W T F Full year of take-homes: www.littleactivity.com/takehome/grade-9 www.littleactivity.com 9th Grade · Math
Addition Within 12 MATH · KINDERGARTEN Name Date Solve each addition problem. Sums up to 12. 6 + 1 = 8 + 3 = 6 + 2 = 1 + 11 = 3 + 1 = 2 + 6 = 11 + 1 = 1 + 8 = 2 + 7 = 5 + 7 = 3 + 7 = 6 + 5 = www.littleactivity.com Kindergarten · Math
Domino Addition MATH · KINDERGARTEN Name Date Count the dots on each domino. Write the addition. 2 + 3 = 4 + 1 = 3 + 3 = 5 + 2 = 1 + 4 = 6 + 1 = www.littleactivity.com Kindergarten · Math
Addition Within 12 — Review MATH · KINDERGARTEN Name Date Solve each addition problem. Sums up to 12. 1 + 7 = 1 + 2 = 3 + 3 = 2 + 6 = 5 + 7 = 10 + 1 = 3 + 1 = 6 + 5 = 4 + 2 = 7 + 2 = 2 + 3 = 2 + 8 = www.littleactivity.com Kindergarten · Math
Addition Within 12 — Challenge MATH · KINDERGARTEN Name Date Solve each addition problem. Sums up to 12. 6 + 3 = 1 + 1 = 1 + 5 = 7 + 3 = 4 + 6 = 5 + 5 = 6 + 2 = 2 + 10 = 6 + 5 = 5 + 3 = 2 + 3 = 2 + 9 = www.littleactivity.com Kindergarten · Math
Addition Within 12 — Extra Practice MATH · KINDERGARTEN Name Date Solve each addition problem. Sums up to 12. 3 + 6 = 1 + 8 = 5 + 4 = 8 + 1 = 2 + 2 = 5 + 7 = 2 + 5 = 1 + 5 = 3 + 3 = 4 + 2 = 4 + 1 = 5 + 5 = www.littleactivity.com Kindergarten · Math
Before & After Numbers MATH · KINDERGARTEN Name Date Write the number that comes before and after. ____ , 25 , ____ → 24, 26 1. ____ , 48 , ____ 2. ____ , 98 , ____ 3. ____ , 76 , ____ 4. ____ , 82 , ____ 5. ____ , 68 , ____ 6. ____ , 58 , ____ 7. ____ , 15 , ____ 8. ____ , 28 , ____ 9. ____ , 49 , ____ 10. ____ , 97 , ____ 11. ____ , 22 , ____ 12. ____ , 93 , ____ www.littleactivity.com Kindergarten · Math
