Curated OER
Balancing Number Sentences to Introduce Missing Values
Students balance number sentences to learn about missing values. In this balanced equations lesson, students use the word problem to study missing values. Students watch a video about the topic and play two games about balancing...
Curated OER
Add and Subtract to 20 Missing Values (1)
In this missing values learning exercise, students add and subtract the given equations for the numbers that range up to twenty. Students write the missing numbers in the blank.
Texas Instruments
Texas Instruments: Solve It! App
This App helps students develop mental math skills through structured play activities. Students progress from simply filling in missing values to actually finding both a number and an operation to make a true sentence.
Other
Stat Soft: Statistics Glossary
Dozens of statistical terms are defined and illustrated in this glossary.