I collected some brain teasers online from various sources and compiled them onto a powerpoint slideshow. I spent a few minutes trying to brief them on what a brain teaser is my translation of "teaser" is not exactly correct but Its the best I could conceive. I just walked them through each type of brain teaser and helped them as much as I could by giving hints. We completed as a class all of the brain teasers on the powerpoint together, and then I handed out the brainteaser worksheet to each group. They needed some help with a few of the words in some of the questions but I was able to help them with those as I walked around the room. The first question about the family reunion was best solved by drawing a tree diagram to illustrate each position in the family. The classes really enjoyed the challenge, and afterwards I had them come to the front of the class and give the answers to the questions.