Chymist
Alum from Waste Aluminum Cans
Turn aluminum cans into pickles! An engaging experiment has learners chemically change aluminum into a substance with many purposes including the manufacture of pickles. After performing the chemical conversion, the experimenters verify...
Curated OER
Commas-Exercise 1
In this comma learning exercise, learners choose an option from a set of two that would correctly fix a comma error in a sentence, 20 sentences total.