How Can You Tell If A Change Has Occurred?

Our introductory exploration of Changes in Matter:

We observed the physical properties of baking soda and vinegar with all of our senses.

Materials Managers wore safety glasses while pouring the vinegar into the baking soda.  (And some thought they were so cool they wore them before.  :-)) 

We observed the physical properties again after pouring the vinegar into the baking soda and noticed several changes!  Do you think this change is permanent?

Check out these changes:

LearnZillion Resources

Last week during my math training, a colleague from another school shared LearnZillion with me.  LearnZillion is a free, online collection of brief tutorial videos.  Here are a few that are relevant to our current unit, Factors, Multiples, and Arrays:

find-all-the-factor-pairs-of-a-number-using-area-models 

find-all-factor-pairs-using-a-rainbow-factor-line

find-all-factor-pairs-of-a-number-using-a-tchart 

determine-if-a-number-is-prime-or-composite-using-area-models 

determine-multiples-of-a-number-using-area-models

determine-all-multiples-of-a-number-using-number-bonds

determine-multiples-of-a-number-using-a-table 

find-multiples-by-using-a-number-line 

We've used many of these strategies in class.  Some are new (finding factor pairs with a t-chart, multiples using number bonds/table/number line), but any of them will work.