Helping with Math
Subtraction : 3-digit - 3-digit
In this subtraction worksheet, math wizards subtract three-digit numbers from different three-digit numbers. Some of the 24 problems require regrouping.
Curated OER
Balancing Bottles
Students explore the Law of Conservation of Matter using effervescent tablets. In this mass and energy instructional activity, students investigate how mass is conserved in the reaction of effervescent tablets and water. They will...
Curated OER
Chemical Volcano
Students observe a demonstration performed by the teacher. They examine of a series of acid/base reactions and discover how various indicators work.
Curated OER
Magic Genie
Pupils observe the chemical change that occurs when sodium iodide is dropped into a flask containing 30% hydrogen peroxide. They discuss how this exothermic reaction occurred as they study the chemical equation involved in the reaction.