Significant Factors

My husband, a Chemistry teacher has been encouraging his Year 11 students to memorise Significant Factors Figures! (nope, me neither).  He asked me to make some sort of badge to give them when they had achieved this...so with the help of the Big Shot, this is what I came up with...

Apparently the badge has been a success as they all want to get one and have hurried up with their memorising.