Curated OER
Fractions, Decimal, Percent Relationships.
Learners solve problems involving fractions, decimals and percents. For this algebra lesson, students examine the relationship between fractions and percents and between decimals and percents. They convert between percents, decimals and...
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Fractions, Decimals, and Percents
In this algebra lesson, students rewrite percents as decimals and decimals as fractions using a calculator. There are 34 problems with an answer key.
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Fraction Conversion 2 (With Percents)
Fifth graders determine how to convert fractions, decimals, and percents. In this conversion lesson, 5th graders use an on-line applet to practice making these conversions. They review how to make the conversions in a whole class lesson...
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Penny Lab
In this percent composition worksheet, students carry out an experiment to determine the percent of zinc in a penny. They write a balanced equation for the chemical reaction they performed with the penny and hydrochloric acid.
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Visual Fractions
Leanrers observe models of fractions and use a calculator to represent numbers as decimals, fractions, and percents. They participate in calculator activities to view different representations of the same number.
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Percentages
Students examine the concept of percent and calculate percentages of one hundred and convert them into fractions and decimals. They view and discuss a one hundred square grid and identify percentages. Students design a playground...
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Ratio, Rates and Percentages
For this ratio, rates and percentages worksheet, 8th graders solve 22 various types of problems related to ratios, rates and percentages. They first write ratios in lowest terms and describe each of comparison stated. Students also solve...
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WS 4.4 Stoichiometry
In this stoichiometry worksheet, students are given four chemical reactions and they find quantities of products made, limiting reactants, excess reactants, and percent yield of products.
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WS 4.8-Review
In this chemistry review worksheet, students solve a variety of problems including balancing equations, solving for unknowns using dimensional analysis, finding percent yields, limiting reactants and empirical formulas.
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Care Homework #7
In this care homework worksheet, students add, subtract, multiply and divide integers. They multiply and divide fractions. Students complete percent problems and determine the area of polygons. This three-page...
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Taxes, Tips, and Salaries
In this taxes, tips and salaries worksheet, students read story problems and determine the sales price, percent of change, amount of tax, and final price. This four-page worksheet contains 8 multi-step prolems. Answers are...
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Percents, Decimals, Fractions
In this identifying equal amounts activity, students fill in the empty columns with the correct percent, decimal, or fraction reduced to lowest terms. Students solve 18 problems.
Creative Chemistry
The Preparation of Teraamminecopper(II) Sulphate-1-Water
In this complex salt instructional activity, learners create teraamminecopper(II) sulfate · 1 · 2H₂O using copper(II) sulfate, concentrated ammonia, and ethanol. Students determine the formula mass for their product, the theoretical...
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Exponential Population Growth
In this exponential population growth worksheet, students read word problems and determine the exponential growth of a specified populations. They find the percent of growth and compute exponential regressions. Students graph...
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Fractions to Percents
For this fractions to percents worksheet, students convert fractions with numbers less than 40 into percents. Students complete 6 problems total.
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Fractions to Percents
In this percent worksheet, students problem solve and calculate how to change ten fractions into percents. Students share their answers with their classmates.
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Froot Loops to the Max - 3
Learners complete and solve five questions/problems related to a box of Froot Loops cereal. First, they determine how many of each color of Froot Loops are in the box. Then, pupils determine which color had the greatest frequency and...
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Froot Loops to the Max - 4
In this Froot Loops to the Max worksheet, 5th graders solve and complete 4 different problem related to counting a box of Froot Loops cereal. First, they determine how many of each color listed there is in the box. Then, students...
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The Mathematics of Chemical Formulas
Wow! This is one of the most exhaustive presentations on finding chemical formulas that you will come across! Beginning with the basics, and leaving junior chemists with procedures and concrete examples, this PowerPoint certainly...
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Condensation Polymerization: Preparation of Thiokoll® (Polysulfide Rubber)
This lab activity is geared toward experienced chemistry learners, in particular, those who are familiar with organic chemistry. They will create a synthetic elastomer and then make observations and measurements of its different...
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2009 U.S. National Chemistry Olympiad National Exam - Part I
The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to...
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2000 U.S. National Chemistry Olympiad National Exam - Part I
The National Chemistry Olympiad exams are comprehensive tests covering an entire year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your...
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Go Figure! Using Percents in the Real World
Sixth graders solve sales tax problems. For this solving sales tax problems lesson, 6th graders find the sales tax on various items. Students are given a list of expenses that a family spent on vacation before taxes. ...
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