Adjust responsiveness of homepage

There are 2 sub-sections of my homepage that do not respond well when the site is viewed on smaller screen sizes, while one sub-section responds as expected. For this project, I'd like to get the 2 sections that don't respond on smaller screens to look like the 3rd. You can see this behavior at: [login to view URL] The 'Aligned to Standards' section responds as I would expect at smaller screen sizes where the gray box MS Physical Science Lab - Energy doesn't cover the 'Search Resources' button and the stack of books image resizes. The 'A Global Community' Emily Boyle, North Carolina gray box covers Browse Groups button at smaller screen sizes and in the 'Curated Resources' section the image of the young girl doesn't resize and the Raisin in the Sun Unit gray box covers the Search Resources button. For this project, I want the 'A Global Community' and the 'Curated Resources' sections to respond in the same manner as the 'Aligned to Standards' section when the screen size becomes smaller at smaller break points.