Free online lessons to try out by eTutor Virtual Learning- School of Choice:
Mathematics lesson for High School students: Similarity Theorems - https://etutorunplugged.com/sample/full/similarity-theorems?etutor=true
Science lesson for Middle/Junior High School students: The Amazing Universe -https://etutorunplugged.com/sample/full/the-amazing-universe?etutor=true
Social Studies lesson for Intermediate students: What Do You Need? - https://etutorunplugged.com/sample/full/what-do-you-need?etutor=true
Language Arts lesson for Primary students: The Mouse And The Lion - https://etutorunplugged.com/sample/full/the-mouse-and-the-lion?etutor=true
A broad selection of topics, subjects and grade levels is offered at https://www.etutorunplugged.com/signup/guardian.