The authors of this TIEE Research Paper assessed analytical and graphing abilities in undergraduate students at four colleges and universities. The authors integrated use of graphing and data analysis skills throughout their lecture and lab courses using active-learning exercises that they developed. At the end of the courses, most students (75-90 %) were adept at interpreting simple bar graphs and scatterplots, and their skills in making graphs from raw data improved considerably. However, little improvement was found in their understanding of independent and dependent variables, and most students (> 50-75 %) had difficulty properly summarizing trends from data with variation. Students also did not improve in their abilities to interpret complex bar graphs with interactions. These areas that may deserve attention from those who teach analytical skills at the college level. The authors recommend strategies to teach these skills and strategies to assess whether teaching methods are effective.