Plus and minus temperature calculating allows kids to understand positive and negative numbers which is seen in Grade 6 in Manitoba.
Reading temperature with a thermometer is an important skill to learn about positive and negative numbers (integers in the higher grades). Talking about 0 degrees Celsius and water melting and freezing is a concept that kids can understand.
Talking about the difference of temperature in the shade versus in the sun is an important concept for kids to understand. Watching the temperature rise is fun for kids to do too!
Reading temperature in Fahrenheit and calculating how many minutes of cook time is left helps kids read numbers in the hundreds and add or subtract the minutes.