Many students in ms. janklow's class seem to have little intrinsic motivation for learning math, science, or social studies. their minds are more apt to be on peer relationships (who the "popular kids" are, who bullies whom on the playground, etc.) than on their studies. without knowing anything else about ms. janklow's students, your best guess would be that they are:

If there is no knowledge regarding of what are her students are, the best guess or would likely the guess of what they are is that they are seventh graders. The reason why this is presumed is because seventh graders are usually in the stage of growing up of being a teenager and they would most likely associate themselves with their peers than studying which is being shown above. That is why they are assumed to be in seventh grade.