This is a Socrative Quiz to use during the LEGO Lab activity I published in The Journal of Chemical Education (http://pubs.acs.org/doi/abs/10.1021/ed200513y) Use the quiz during the lab to guide students, or as an assessment afterwards.
This is a fun way to get kids to visualize ionic formulas. Combine LEGOs with an app on their phone and you can't go wrong!
Abstract: An activity in which students use toy interlocking building blocks to build representations of ionic formulas is described. Students explore cation-to-anion ratios using interlocking toy brick-like blocks to represent trivalent, divalent, and monovalent cations and anions. Students who participated in the building blocks activity showed significantly higher posttest scores than students who had not participated.