CK-12 Foundation
Whole Number Addition: Let's Go Fishing!
Practice adding whole numbers by combining the amount of fish Alice and Bob catch. As young mathematicians work through each problem, they are asked to find one more plus the amount of fish already caught. They can manipulate the...
Curated OER
Percent / Percentage Word Problems (Part 2)
In this online math activity, students solve word problems associated with percentage. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!
American Museum of Natural History
DNA Detective
DNA is like the fingerprint of genetics. A quick lesson introduces the topic of DNA sequences with a mystery about an endangered species. The lesson shows how DNA extraction, replication, and sequencing often provide undeniable evidence...
American Museum of Natural History
DNA Detective
Match up the DNA code. Pupils read the website from the American Museum of Natural History about how DNA can determine whether a skin is from a particular type of reptile. Using the same technique, learners match up products with the...
Curated OER
Decimal Word Problems (mixed operations)
In this decimals activity, students solve word problems involving numbers with decimals and mixed operations. Students complete 6 problems total.
Curated OER
Problem Solving with Addition and Subtraction: Post Test
In this addition and subtraction worksheet, students answer multiple choice questions where they solve word problems using 2 and 3 digit numbers. Students complete 10 questions total.