I gave Rory a dozen trinomials to factor. He did well with finding the factors, but needed some correction with the signs on the factors. I showed him some patterns and tricks to help him remember if the signs should be the same or different, as well as which signs to put on which specific numbers. I also gave him an example of factoring ax^2 + bx + c, in which he has to find factors of a and c that will multiply and combine to get b.