Curated OER
1999 U.S. National Chemistry Olympiad Part II
A variety of topics including reaction rates, combustion reactions, periodic trends, and ionization reactions are included in this exam. Test takers also practice calculating empirical and molecular formulas of compounds.
Curated OER
2001 U.S. National Chemistry Olympiad National Exam Part II
Only eight problems are on this competitive national chemistry exam. It required the balancing of chemical equations, solving stoichiometry questions, and more. This is part two of three of the national exam. Also available is a local...
Curated OER
2004 U.S. National Chemistry Olympiad Exam Part II
In this National Chemistry Olympiad test, junior chemists answer eight problem solving questions on a variety of topics. These include calculating molarity of solutions, determining rates of reactions, calculating decay and discussing...
Curated OER
Context Clues II Pretest
In this ESL context clues worksheet, students choose the answer that best defines a word that is given within the context of a sentence.
Curated OER
How Hot Is It?
Fourth graders practice estimating temperatures. They practice in Celsius and Fahrenheit.
Curated OER
Hickory Dickory Dock: The Biological Clock
Students investigate the effect of day length on animal migrations. They view a Powerpoint presentation, identify their own personal migrations and cues, answer discussion questions, and test a hypothesis about seasons.
CK-12 Foundation
Ck 12: Elem Math: Elapsed Time Finding the Start Time (Multiple Steps)
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must solve multi-step word problems by using elapsed time to calculate the starting time. Includes video demonstrating a sample...
CK-12 Foundation
Ck 12: Elem Math: Elapsed Time Finding the Ending Time (Single Step)
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are given the elapsed time and must calculate the time something ended, using the 24-hour format. Includes video demonstrating a...
CK-12 Foundation
Ck 12: Elem Math: Solving for Start Time End Time or Elapsed Time
[Free Registration/Login may be required to access all resource tools.] The video involves filling in a chart of start time, end time, and elapsed time describing how to add and subtract time in hour and minutes. The video is followed by...
Alabama Learning Exchange
Alex: Calculating Elapsed Time With Time Rulers
Students will explore their prior knowledge of time, discuss fractional parts of an hour, and use a specialized time ruler to calculate elapsed time for real life situations.
CK-12 Foundation
Ck 12: Elem Math: Finding the Time With a Timeline
[Free Registration/Login may be required to access all resource tools.] For this learning module, students must solve word problems involving elapsed time using a timeline. Includes video demonstrating a sample problem [0:52] and a set...
CK-12 Foundation
Ck 12: Elem Math: Determining Duration Time
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are asked to solve multi-step word problems involving elapsed time. Includes video demonstrating a sample problem [1:28] and a set...
CK-12 Foundation
Ck 12: Elem Math: Determining Elapsed Time With Fractions
[Free Registration/Login may be required to access all resource tools.] For this learning module, students solve multi-step word problems involving time written in 24-hour format as well as fractions. Includes video demonstrating a...
CK-12 Foundation
Ck 12: Elem Math: Telling the Time Before and After
[Free Registration/Login may be required to access all resource tools.] A practice quiz where students must answer questions about elapsed time.
CK-12 Foundation
Ck 12: Elem Math: Identifying Hourly Time Change
[Free Registration/Login may be required to access all resource tools.] Students attempt practice problems on identifying hourly time changes.
CK-12 Foundation
Ck 12: Elem Math: Determining Duration of Time One Step
[Free Registration/Login may be required to access all resource tools.] For this learning module, students solve word problems involving time written in 24-hour format. Includes video demonstrating a sample problem [0:38] and a set of...
CK-12 Foundation
Ck 12: Measurement: Addition and Subtraction With Time
[Free Registration/Login may be required to access all resource tools.] Find sums and differences of measurements of time by converting units.
Scholastic
Scholastic: Max's Math Adventures: The Snowball
Join Max and Ruthie on a snow day math adventure and see how many things can happen in just one day. Teachers will like this lesson's approach to experiencing and telling time. Use the teacher's guide, activity sheet, and extra...
Math Slice
Math Slice: Elapsed Time: Math Worksheets
Select a time interval, from one minute to one hour, and this tool creates a worksheet for you. Students must calculate the time interval between two clocks. You can then click on the 'New Worksheet' button at the top to create a fresh...
E-learning for Kids
E Learning for Kids: Math: Living in the Mill: Time
On this interactive site students learn to read, interpret and use 24-hour time in real-life situations.
NumberNut
Number Nut: Breaking Up an Hour Into Minutes
Build your measurement and time telling skills in this lesson where the hours are broken down into minutes. Lots of related vocabulary and common time referents presented. There are links available to interactive elapsed time and...
Khan Academy
Khan Academy: Time Differences (Within the Hour)
Practice finding the difference between times given on two analog clocks. Each time difference is less than 60 minutes, and the hour hand stays on the same hour. Students receive immediate feedback and have the opportunity to try...
Khan Academy
Khan Academy: Telling Time Word Problems (Within the Hour)
Solve a word problem to find the duration of an event. Both analog or digital clocks are included. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.