[cs_content][cs_element_section _id=”1″ ][cs_element_row _id=”2″ ][cs_element_column _id=”3″ ][cs_element_text _id=”4″ ][cs_content_seo]This PACE covers covalent bonding and has some challenging concepts, like polar and nonpolar bonds and molecules. Using models of molecules, I try to explain this section just before the first check-up. The video is 25 minutes, but I think the lesson will help you. \n\n[/cs_content_seo][/cs_element_column][/cs_element_row][/cs_element_section][cs_element_section _id=”5″ ][cs_element_row _id=”6″ ][cs_element_column _id=”7″ ][cs_element_headline _id=”8″ ][cs_content_seo]Before first checkup\n\nSubheadline space\n\n[/cs_content_seo][/cs_element_column][/cs_element_row][cs_element_row _id=”9″ ][cs_element_column _id=”10″ ][cs_element_video _id=”11″ ][/cs_element_column][/cs_element_row][/cs_element_section][/cs_content]