**"2 truths and a lie" error analysis activities:**

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Free math resource library |

In this post you'll find "2 truths and a lie" math activities, each with error analysis questions built right in. Every activity is set up the same way-- find the error (the "lie") on each card, then correct the error on the student answer sheet. Students get practice identifying math errors in the context of different math topics, and then with fixing those errors.

Here is the first card from an integer operations "2 truths and a lie" error analysis activity. There are 3 integer operations problems on the card, along with 3 statements comparing the answers. Students solve the 3 problems then figure out which statement is the "lie". Students then fix the lie on their answer sheet.

For this slope "2 truths and a lie", students are presented with a graph, a table and a pair of coordinates, as well as 3 statements about each representation's slope. Students need to figure out which of the 3 statements is the lie, then correct that lie on their answer sheet.

You can see all individual "2 truths and a lie" error analysis math activities here:

Free math resource library |

You probably already know that if you could fold a piece of paper 42 times the stack would reach the Moon. This always feels so unbelievable, but the math checks out! In this post, I want to share a couple handouts for students to support a discussion about exponential growth, folding paper to reach the Moon and also a few conversation starters.

Last summer, my daughter worked hard to learn her multiplication facts. Some facts she memorized, some she used strategies such as building on the facts that she already knew. For example, she adds one more number to her 11s to get to 12s. For 8 x 12, she multiplies 8 x 11 and adds 8. This was a multiplication strategy she completely taught herself.

Teaching the ins and outs of budgeting was one of my favorite units to teach in Consumer Math. It started with us calculating net monthly income and ended with us commenting on how much we all spend on food. It was a fun unit to teach because it gave students the tools to analyze their own spending and how it aligned with their future goals.

In our wages and salary unit, we learned that net monthly income is about 70% of gross monthly income. We often used this net income estimation when budgeting.

The Scaffolded Consumer Math Curriculum has a new unit-- health insurance. Students will learn the ins and outs of copays, coinsurance, deductibles, out of pocket maximums, and of course the math behind it all.

Just like every other unit in the curriculum, the new health insurance unit includes a printable PDF student book unit, a teacher's unit with answers to questions asked in the student book, student notebook pages, PowerPoint notes, an editable quiz, warm-ups and all answer keys.

Vocabulary includes: premium, deductible, plan, deductible balance, HMP, PPO, copay, coinsurance, PCP, referral, specialist, out of pocket maximum, open enrollment period.

There's a lot of math involved in health insurance, especially between meeting a deductible and meeting OOPM, and with coinsurance payments. My hope is that this new unit clarifies health insurance for your students and gives them confidence calculating costs.

consumer math curriculum |

Ripping the corners off a triangle to prove the sum of its interior angles is 180 degree is my favorite visual proof. Over the weekend, I posted a couple short videos for finding the sum of interior angles in a polygon, so here I wanted to share the videos and the worksheets from the videos.

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