feat: lab 6 grid tip

docs/labs/week6/3.md

@@ -54,4 +54,27 @@ This flexibility is what makes opensource tools and plugins so great! However, b
 
 Congrats!
 
-After you've made this change the time has come to make a pull request!
+After you've made this change the time has come to make a pull request!
+
+### CSS Grid Tip
+
+When you have many items in a row, you can use the `grid-template-columns` property to make sure they are spaced out evenly.
+
+```css
+.grid-container {
+  display: grid;
+  grid-template-columns: auto auto auto;
+}
+```
+
+You can also use CSS grid to make evenly spaced items for a responsive design.
+
+```css
+.grid-container {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
+}
+```
+
+This will make sure that the items are at least 200px wide, but will expand to fill the space if there is more room.
+