Massachusetts Speech and Debate League The MSDL (http://www.msdlonline.org) is the state high school speech league. If you are looking for information on high school speech and debate, you should go to their site. Remember that middle school students are not allowed to compete in high school tournaments unless a specific tournament explicitly invites middle school teams to compete.
The National Speech and Debate Association The NSDA (https://www.speechanddebate.org) has many useful resources for education on this activity. To view some of their materials a paid membership is required.