Saber and Conocer
Unlike English, there are two ways to say "to know" in Spanish. But there's not interchangeable. Saber is used for knowledge of facts, Conocer is used for things we're familiar with, like people we've met. But to get a clearer idea, here are lots of resources for you.
Online activities from the Realidades textbook
Book 1 Ch. 9B p. 460, Book 2 Chapter 1B p. 56
Online activities from the Exprésate textbook
Book 1 Chapter 9B p. 328 (Conocer and the Personal A)
Book 2 Chapter 2A p. 52 (Saber and Conocer)
Videos and interactive activities to learn Spanish online
Excellent grammar explanations with video
Video interviews, podcasts, and grammar explanations
Online Grammar Lessons with worksheets
Music videos to help you learn!
Kahoot! Game - Amnesia