For older students looking to self-study basic chemistry before returning to college, several resources are recommended. The "Chemistry as a Second Language" and "Organic Chemistry as a Second Language" series are praised for their clarity and accessibility. For foundational knowledge, "Introductory Chemistry" is suggested for those with limited math skills, while "Elementary Chemistry" is suitable for others. Although these courses may not be transferable, they provide essential groundwork. Additionally, purchasing a used introductory college chemistry textbook is advised, along with utilizing online resources and forums for support. A specific helpful link is provided for further assistance in learning chemistry.